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Author Topic: A Question About Dr. Robert Zacharko.  (Read 5001 times)

Offline Joe Elliott

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Re: A Question About Dr. Robert Zacharko.
« Reply #8 on: June 25, 2020, 12:17:44 AM »
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Dr. Zacharko was not "kept in ignorance" about anything.

False. He was kept in ignorance of the main piece of evidence that LNers always bring forward when arguing for the Neuromuscular Spasm Hypothesis. The film of the goat being shot through the brain.



I didn't mention to him all the war footage that shows bodies traveling in the same direction as that of the striking bullet, either. I didn't mention that the bullet that struck Connally knocked him forward, and that Connally said it felt like someone hit him hard in the back with their fist. Why don't you deal with Dr. Zacharko's answer instead of this diversionary line of questioning?

You’re still playing the same game. Only mentioning films that show bodies falling away from the shooters. How about mentioning films were the bodies fall toward the shooters. Like the Holocaust film from Liepaja, Latvia, taken in the summer of 1941:


The amount of momentum in a bullet weighing a third of an ounce, going 1,400 mph, contains the same amount of momentum that a 28-pound weight has going 1 mph. And only about half or less of the momentum gets transferred since a rifle bullet typically exits a body with half or more off its speed. That is why some of the victims of this massacre fell toward the shooters, others away.

Look at the Mythbusters videos of targets weighing the same a human being struck by many types of bullets, including rifle bullets. The experiments match what simple calculations, like the one I provided, say. Not a lot of momentum is transferred, because bullets only have a small amount of momentum. They don’t fling bodies around violently, or even at 2 mph.

A soldier shot in combat might start moving quickly in certain directions just before getting hit, might start to flinch away from gunflashes. Giving the false impression that they were being flung about by bullets.

Tests with a ballistic gel target, like the Myth Busters use, are a better test because ballistic gel targets don’t’ flinch away from gunfire.



It is a little silly to claim that Dr. Zacharko's answer was "based on ignorance" because I didn't mention an irrelevant goat film. I notice you did not address Dr. Riley's point that the neurobiology and neurophysics of a goat are completely different from that of a human.

You claim the goat film is irrelevant.

Can you support your unfounded claim? This unfounded excuse not to inform Dr. Zacharko of the existence of this film? That is:

Question 1:
Can you name a single article, a single book, that argues for the Neuromuscular Spasm as being the cause of JFK’s backward movement, that does not even mention the film of the goat?


If not, then this is not an irrelevant fact, but core of the claim of the Neuromuscular Spasm Hypothesis and should have been mentioned to Dr. Zacharko before asking for this opinion, since this might have altered his conclusions.



Question 2:
Should an authority be informed of the main argument, the main piece of evidence, of both sides before being asked for his opinion? Yes or No.


Or is it sometimes best to keep him in ignorance.



Question 3:
Should the decision to dismiss the main piece of evidence presented by LNers, be made by Dr. Zacharko or Michael Griffith?




I notice you didn't address Dr. Thompson's arguments against the neuro-muscular reaction theory, either. Without that theory, you have no way to explain the incredible speed of the opposing movements unless you allow for a shot from the front.

Doctor Thompson, is it? Are you trying to give the false impression that you do have a medical doctor who knows about the goat film and whose medical expertise leaves him to not believe in the Neuromuscular Spasm? Josiah Thompson has a Ph.D. in Philosophy, not in medicine. Again, you phrase things that are technically correct, but misleading.

So, what does our good “doctor” has to say:

Quote
The extremely small time factor combined with the relatively large mass of the President's head would tend to rule out such an explanation. The fastest reflex action known to science--the startle response--takes place over an interval of 40 to 200 milliseconds. Beginning with an eyeblink in 40 milliseconds, the response wave moves the head forward in 83 milliseconds, and then continues downward reaching the knees in 200 milliseconds. The change in direction we observe [i.e., the change from the forward motion of JFK's head to the more violent rearward motion] occurs in 56 milliseconds (1/18th second), and involves not the negligible mass of an eyelid but the considerable mass of a human head moving forward under an acceleration of several g's.

Interesting. Except the goat started moving its body 40 milliseconds after being shot. And not with an eye blink. So, regardless of the opinion of “Doctor” Thompson, the Neuromuscular Spasm can start within 55 ms, or indeed, withing 40ms.



To excuse Dan Rather's description of the head movement as a memory mistake seems weak and strained. He had just watched the film a few hours earlier. His description of Connally's reaction is accurate. His description of when the film started matches what Zapruder himself said. His description of the head movement was the movement seen on the original film. Rather would not have mistaken a violent backward movement for a violent forward movement. DeLoach saw the same violent forward movement in the version (the original) that he saw. Bill Newman and several other witnesses likewise reported that sharp forward movement.

Witness are often in error when interviewed within a few hours, or even immediately. They may remember somethings right and somethings wrong. Can you prove that Dan Rather had an infallible photographic memory? Or name any person in the world with an infallible photographic memory?



Posner's theory that the wind blew the particulate matter at Hargis with such force that he thought he'd been hit is ridiculous. The current Z film shows no spray blowing backward (it blows to the right front, toward the camera, and then, remarkably, disappears in a few frames). The wind that day was not continuous but was blowing intermittently. The limo's windshield and roll bar would have blocked much of the wind from blowing the spray backward anyway.

Again, you are being misleading. Hargis never said that he was hit with such force he thought he had been hit. Only CTers said that.

He only said he felt something hit his face and thought he was shot. He doesn’t say it was the force of the object that convinced him he was shot. It could be he saw the head explode, felt something touch him and thought he was struck. And how much force could he been struck with and still leave him unwounded?



You said, "That initially, the head moved forward 2.3 inches between two Zapruder frames. Then it moved back." Uh, yeah, I made that exact point. And your only explanation for this amazing reversal of motion is the neuro-muscular reaction theory, a theory that even some of your fellow lone-gunman theorists reject, which is why they've opted for the jet-effect theory.

Not all LNers are right about everything. I’m sure some of my current beliefs about the assassination will change in the future, as they have in the past.



You said, "From z313 through z318, over a quarter of a second period, it accelerated from 0.0 mph to 1.9 mph. 2 mph is not being moved violently." LOL!  Seriously?!!!  So a 190% increase in speed in five frames on an object that has moved 2.3 inches in 1/18th of a second does not meet your definition of "violent"?!  And leaving aside this nonsensical denial, has it just been a while since you watched the Zapruder film?  I have never known anyone who claims that the backward movement of JFK's head in the film is not violent and dramatic. Not only does does his head move violently backward, but his torso is also thrown backward with considerable--obvious--force.

No, it’s not a 190% increase. It is an infinite amount of increase, from 0 mph to 2 mph. But it doesn’t matter, a 190% increase or an infinite amount of increase, is still only an increase of 2 mph. If this is violent movement than every time, I walk through the neighborhood I do so with a violent amount of speed. I’m liable to break someone’s ribs if I bump into them.

If you say to someone: JFK’s head was very violently thrown backwards. Could this be the result of a Neuromuscular Spasm? Your average person will answer no. How could the human body be capable of such violent movement?

But if you say to someone: JFK’s head moved backwards, over a time of a quarter of a second, from 0 mph to 2 mph. Could this be the result of a Neuromuscular Spasm? Your average person will be more inclined not to dismiss the Neuromuscular Spasm Hypothesis out of hand.


Question 4:

In the future, will you tell people that JFK’s head was thrown back violently, or tell them it moved backwards at 2 mph?



Question 5:

And the most important question of all. Do you believe a bullet only transfers momentum to a target while it is passing through the target?

Or do you believe a bullet can continue to transfer momentum to a target even after it’s left the body. Accounting for the gradual increase of speed of JFK’s backwards from 0 mph to 2 mph over the course of a quarter of a second.




I’m going to keep asking questions 1 through 5 until you answer them.

JFK Assassination Forum

Re: A Question About Dr. Robert Zacharko.
« Reply #8 on: June 25, 2020, 12:17:44 AM »


Offline Michael T. Griffith

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Re: A Question About Dr. Robert Zacharko.
« Reply #9 on: June 25, 2020, 01:13:56 AM »
Dr. David Mantik, who is both a physicist and a medical doctor (radiation oncology), explains some of the problems with the neuromuscular reaction theory:

Quote
The other traditional explanation for the head snap has been the "neuromuscular reaction." This was first proposed to the HSCA not by any neuroscience specialist, but by a wound ballistics expert based on his viewing old films of goats being shot in the head. To date no official testimony has been obtained from appropriate specialists (the neuroscientists) on this question. At the very least, interspecies differences in neurophysiology would leave this conclusion open at least to some doubt. In addition, the usual reaction to such brain trauma is not the highly directed movement observed in the Zapruder film but rather random muscular activity. Even Alvarez concluded that the highly directional recoil seen in the Zapruder film required the application of an external force.

Yet another objection to the decerebrate rigidity invoked by the HSCA is the time of onset; even the HSCA admitted that this would develop only after several minutes. I have been unable to find any literature references that even hint that this reaction could occur within milliseconds in human subjects-as is required for the head snap as seen in the film. Furthermore, in a large collaborative study (A.E. Walker, Cerebral Death, 1981, p. 33) with over 500 patients who experienced cerebral death, 70% were limp when observed just before death and an additional 10% became limp at about the time of death. At the very least, therefore, based on all of these considerations, the attempt by the HSCA to implicate a neuromuscular reaction is open to serious doubt. Moreover, the minimum requirement has never been met-the appropriate experts have never been officially consulted.

An additional argument against a neuromuscular reaction is that the observed reaction in the film is much too fast to fit with such a reflex. By the analysis of more than one study, within the space of one Zapruder frame interval (55 msec), the head clearly moves backward. Typical human reflex times are 114 to 112 second (250 to 500 msec). This is an extraordinary discrepancy-a factor of 5 to 10, which, all by itself, makes this scenario quite unlikely. (Assassination Science, pp. 281-282, PDF copy available online at https://www.krusch.com/books/kennedy/Assassination_Science.pdf)
« Last Edit: June 25, 2020, 01:14:40 AM by Michael T. Griffith »

Offline Joe Elliott

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Re: A Question About Dr. Robert Zacharko.
« Reply #10 on: June 25, 2020, 02:30:46 AM »

Quote
The other traditional explanation for the head snap has been the "neuromuscular reaction." This was first proposed to the HSCA not by any neuroscience specialist, but by a wound ballistics expert based on his viewing old films of goats being shot in the head. To date no official testimony has been obtained from appropriate specialists (the neuroscientists) on this question. At the very least, interspecies differences in neurophysiology would leave this conclusion open at least to some doubt. In addition, the usual reaction to such brain trauma is not the highly directed movement observed in the Zapruder film but rather random muscular activity.

It is unethical to run this experiment with humans, so we must limit ourselves to experiments on animals, like goats.

The movement of the goat is not random at all. Both the left and right half of the body move the same way. Both forelimbs kick forward. Both hindlimbs kick backwards. And the back arches. Just like what we see happen to JFK. Both the goat video and the Zapruder film, are consistent with a spurious signal down the spinal cord telling all muscles to contract, causing the stronger muscle of each pair to move a body part.



Quote
Even Alvarez concluded that the highly directional recoil seen in the Zapruder film required the application of an external force.

Dr. Alvarez was not a medical doctor but a great Physicist, so it is natural that he would look for the answer to be found in Physics.

So, essentially, we must conclude that the Jet Effect Hypothesis is false because some LNers support the Neuromuscular Spasm Hypotheses. And the Neuromuscular Spasm Hypotheses is false because some LNers support the Jet Effect Hypotheses. We can’t even consider the possibility that some LNers are wrong, while some are right, and that one of these hypotheses is true.



Quote
Yet another objection to the decerebrate rigidity invoked by the HSCA is the time of onset; even the HSCA admitted that this would develop only after several minutes. I have been unable to find any literature references that even hint that this reaction could occur within milliseconds in human subjects-as is required for the head snap as seen in the film. Furthermore, in a large collaborative study (A.E. Walker, Cerebral Death, 1981, p. 33) with over 500 patients who experienced cerebral death, 70% were limp when observed just before death and an additional 10% became limp at about the time of death. At the very least, therefore, based on all of these considerations, the attempt by the HSCA to implicate a neuromuscular reaction is open to serious doubt. Moreover, the minimum requirement has never been met-the appropriate experts have never been officially consulted.

But the goat starts to move within 40 ms of being shot through the brain. But, again, you feel that the opinion of armchair experts, who do not study the film of real animals being shot through the brain, should overrule what film actually shows us. And conclude that an animal being shot though the brain cannot react within 55 ms but instead would take several minutes to observe any body movement in either the goat or JFK.



Quote
An additional argument against a neuromuscular reaction is that the observed reaction in the film is much too fast to fit with such a reflex. By the analysis of more than one study, within the space of one Zapruder frame interval (55 msec), the head clearly moves backward. Typical human reflex times are 114 to 112 second (250 to 500 msec). This is an extraordinary discrepancy-a factor of 5 to 10, which, all by itself, makes this scenario quite unlikely. (Assassination Science, pp. 281-282, PDF copy available online at https://www.krusch.com/books/kennedy/Assassination_Science.pdf)

But this claim is false because the goat in the video beings to move 40 milliseconds after being shot in the head. While typical animal reflexes do take longer than 40 ms, the neuromuscular spasm is much faster. But rather than accept what the film shows us, you decide that the armchair analysis of a doctor overrules what the film shows.


Well, you dodged all five of my questions. So I will ask them again.


Question 1:
Can you name a single article, a single book, that argues for the Neuromuscular Spasm as being the cause of JFK’s backward movement, that does not even mention the film of the goat?


If not, then this is not an irrelevant fact, but core of the claim of the Neuromuscular Spasm Hypothesis and should have been mentioned to Dr. Zacharko before asking for this opinion, since this might have altered his conclusions.



Question 2:
Should an authority be informed of the main argument, the main piece of evidence, of both sides before being asked for his opinion? Yes or No.


Or is it sometimes best to keep him in ignorance.



Question 3:
Should the decision to dismiss the main piece of evidence presented by LNers, be made by Dr. Zacharko or Michael Griffith?



Question 4:

In the future, will you tell people that JFK’s head was thrown back violently, or tell them it moved backwards at 2 mph?



Question 5:

And the most important question of all. Do you believe a bullet only transfers momentum to a target while it is passing through the target?

Or do you believe a bullet can continue to transfer momentum to a target even after it’s left the body. Accounting for the gradual increase of speed of JFK’s backwards from 0 mph to 2 mph over the course of a quarter of a second.




I’m going to keep asking questions 1 through 5 until you answer them.

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Re: A Question About Dr. Robert Zacharko.
« Reply #10 on: June 25, 2020, 02:30:46 AM »


Offline Michael T. Griffith

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Re: A Question About Dr. Robert Zacharko.
« Reply #11 on: June 25, 2020, 01:34:34 PM »
It is unethical to run this experiment with humans, so we must limit ourselves to experiments on animals, like goats.

The movement of the goat is not random at all. Both the left and right half of the body move the same way. Both forelimbs kick forward. Both hindlimbs kick backwards. And the back arches. Just like what we see happen to JFK. Both the goat video and the Zapruder film, are consistent with a spurious signal down the spinal cord telling all muscles to contract, causing the stronger muscle of each pair to move a body part.

This is quack material, downright nutty. But it's all you have because you will not allow yourself to consider the evidence of a shot from the front.

You keep ignoring the point that neuromuscular reactions in humans are not fast enough to cause the movement we see in the Zapruder film. Several scholars have made this point, including Thompson and Mantik, but you keep ignoring it.

You also keep ignoring Dr. Riley's point, reinforced by Dr. Mantik, that goat and human neurobiology and neurophysics are very different.

And are you ever going to deal with Dr. Zacharko's point that the neuromuscular-reaction theory is "simply nonsense"? Let's read his bottom line on this nutty theory:

"Neural damage per se associated with bullet entry will not cause exaggerated head movement of the type you see in the Zapruder film. In fact there are no brain sites that will. This neuromuscular reactivity argument is simply nonsense. . . .

"Actually there is a system which is referred to as the extrapyramidal motor system, which runs from the mesencephalon to the forebrain. It controls voluntary movement. If this system was to discharge, you would effect gross motor output. Such discharge would typically represent the invasion of seizure like activity to motor areas. It would not be coordinated and certainly not of the type evident in the Zapruder film. The bottom line is that the head movements are reactions to the direction of bullet entry. They are not the product of central nervous system damage."

Dr. Alvarez was not a medical doctor but a great Physicist, so it is natural that he would look for the answer to be found in Physics.

Yeah, who needs science when it comes to avoiding conclusions you don't like, right?

So, essentially, we must conclude that the Jet Effect Hypothesis is false because some LNers support the Neuromuscular Spasm Hypotheses. And the Neuromuscular Spasm Hypotheses is false because some LNers support the Jet Effect Hypotheses. We can’t even consider the possibility that some LNers are wrong, while some are right, and that one of these hypotheses is true.

Which is a very long-winded way of dancing around the point that even some of your fellow WC apologists can see that the neuromuscular-reaction theory is "simply nonsense."

But the goat starts to move within 40 ms of being shot through the brain. But, again, you feel that the opinion of armchair experts, who do not study the film of real animals being shot through the brain, should overrule what film actually shows us. And conclude that an animal being shot though the brain cannot react within 55 ms but instead would take several minutes to observe any body movement in either the goat or JFK.

In other words, never mind what we know from science about the speed of human neuromuscular reactions, and never mind the impossibility of the physics involved with the violent reversal of movement. Nah, forget about all that stuff and instead cling for dear life onto some irrelevant video of a goat being shot in the head with its head secured, and never mind that goats and humans have very different neurobiology and neurophysics.

But this claim is false because the goat in the video beings to move 40 milliseconds after being shot in the head.

Was JFK a goat? Is that your theory but you're just not saying it? Goat, goat, goat, goat. Here, read this carefully: Goats and humans have different neurobiology and neurophysics. JFK was not a goat. Who cares about the reactions of a goat when we know that human neuromuscular reactions are not fast enough to produce the movement we see in the Zapruder film?

While typical animal reflexes do take longer than 40 ms, the neuromuscular spasm is much faster. But rather than accept what the film shows us, you decide that the armchair analysis of a doctor overrules what the film shows.

No, the problem is that rather than accept what science tells us about the speed of human neuromuscular reactions, and rather than accept the fact that humans are not goats, and rather than accept the fact that human and goat neurobiology and neurophysics are different (which most high schoolers would guess just based on common sense), and rather than deal honestly with the impossibility of the physics of the split-second reversal of the movement of JFK's head--rather than accept these facts, you keep citing this ridiculous goat film.

And, we are not talking about one "armchair analysis of a doctor" but of the analyses of several doctors (one of whom is also a physicist), two neuroscientists (Riley and Zacharko), several forensic pathologists (including a former head of the American Academy of Forensic Sciences), and at least three physicists (Alvarez, Snyder, and Chambers).

Well, you dodged all five of my questions. So I will ask them again.

Okay, let's deal with your silly questions.

Question 1:
Can you name a single article, a single book, that argues for the Neuromuscular Spasm as being the cause of JFK’s backward movement, that does not even mention the film of the goat?

The goat film again?!  Given that those who argue for the neuromuscular-reaction theory must ignore a mountain of science to even float the theory, I have no doubt that they throw in the irrelevant goat film to support their claim--apparently, they, like you, just don't care about the differences between goat and human neurobiology and neurophysics, nor about what science tells us about the speed of human neuromuscular reactions.

If not, then this is not an irrelevant fact, but core of the claim of the Neuromuscular Spasm Hypothesis and should have been mentioned to Dr. Zacharko before asking for this opinion, since this might have altered his conclusions.

Let me ask you a serious question in return: Do you think Dr. Zacharko would change his mind, that he would decide that the neuromuscular-reaction theory is not "simply nonsense," if he watched the goat film? Do you?

And you know that Dr. Zacharko was not just basing his answer on my description of the Zapruder film but that he had watched the film himself, right? You know that, right?

If the "core" of the neuromuscular-spasm theory is the irrelevant goat film, that should tell you what a ridiculous, unscientific theory it is. As Dr. Zacharko said, it is "simply nonsense" because science tells us that humans do not move the way JFK does in response to neuromuscular activity. Let's read Dr. Zacharko's point about this again:

"If this system was to discharge, you would effect gross motor output. Such discharge would typically represent the invasion of seizure like activity to motor areas. It would not be coordinated and certainly not of the type evident in the Zapruder film.

"The bottom line is that the head movements are reactions to the direction of bullet entry. They are not the product of central nervous system damage."

Question 2: Should an authority be informed of the main argument, the main piece of evidence, of both sides before being asked for his opinion? Yes or No. Or is it sometimes best to keep him in ignorance.

LOL! So the goat film is the "main piece of evidence" for your nutty neuromuscular-spasm theory?! Actually, I probably did your nutty theory a favor by not mentioning the goat film to Dr. Zacharko. Truth be told, it never occurred to me to mention that irrelevant film. Instead, I carefully described JFK's movements from Z312 onward and quoted two prominent authors on the science and physics of those movements.

Again, do you think Dr. Zacharko would change his mind based on the goat film? Do you think he would conclude that the human extrapyramidal motor system behaves differently than the way he described it, if he saw the goat film? After all, as you can see from his full response, he described in considerable detail the workings of the human extrapyramidal motor system, and also the pons, the medulla, and the cerebellum, and then explained that the extrapyramidal motor system would not cause the movement of JFK's head seen in the Zapruder film.

Question 3: Should the decision to dismiss the main piece of evidence presented by LNers, be made by Dr. Zacharko or Michael Griffith?

I guess it’s time for another review for you: Goats are not humans. Goats and humans have very different neurobiology and neurophysics. The goat film is irrelevant. JFK's movements are a matter of humanneurobiology and neurophysics, and Dr. Zacharko addressed them on that basis.

Again, do you think the goat film would cause Dr. Zacharko to change his conclusion that the relevant part of human neuroanatomy--the extrapyramidal motor system--would magically behave differently than he described it?

Question 4: In the future, will you tell people that JFK’s head was thrown back violently, or tell them it moved backwards at 2 mph?

Oh. My. Goodness. You are so lost in lone-gunman delusion that you can't see the forest for the huge trees. Anyone not blinded by lone-gunman denial can see with their own eyes that JFK's head and upper body are thrown violently backward and to the left from Z313-323. You are the first WC apologist I have ever personally encountered who describes that movement as “gradual” and who denies that it is violent.

And, again, what makes this movement even more incredible is that it begins a split second after the head moves 2.3 inches forward in 1/18th/second.

Question 5: And the most important question of all. Do you believe a bullet only transfers momentum to a target while it is passing through the target? Or do you believe a bullet can continue to transfer momentum to a target even after it’s left the body. Accounting for the gradual increase of speed of JFK’s backwards from 0 mph to 2 mph over the course of a quarter of a second.

Sigh. . . . Well, first of all, a 190% increase in speed in five frames, going from 0 to 1.9 mph in 5/18th/second, by an object that has just moved 2.3 inches forward (the opposite direction) in 1/18th/second is not "gradual" by any rational analysis. This is the kind of nonsense that you must posit when you are locked into an absurd theory of the shooting and the head movement. Again, anyone can look at the Zapruder film and see with their own eyes that Kennedy's head and upper body are propelled violently backward and to the left.

As for how human bodies respond to bullet strikes, it depends on the type of bullet, the type of rifle, and the action, or lack thereof, by the person just before they are struck. There is war footage that shows prisoners being executed by nearly point-blank gunfire where the prisoners exhibit no violent movements but simply fall down. There is other war footage that shows prisoners' heads moving in the same direction as the bullet that strikes them: forward when shot from behind, and backward when shot from the front. Connally's right shoulder was pushed noticeably downward by the bullet that struck him in the back, and he said it felt like someone hit him hard in the back with their fist. Martin Luther King was knocked backward by the bullet that struck him in the front.

The problem with the Zapruder film, i.e., an indication that it has been altered, is that no bullet would cause JFK's head and upper body to reverse direction so rapidly. The original film showed two noticeable reactions: JFK's head being knocked forward and then JFK's head being knocked backward but not as fiercely as we see in the current film.
« Last Edit: June 25, 2020, 07:16:54 PM by Michael T. Griffith »

Offline Joe Elliott

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Re: A Question About Dr. Robert Zacharko.
« Reply #12 on: June 25, 2020, 05:15:05 PM »

Quote
The other traditional explanation for the head snap has been the "neuromuscular reaction." This was first proposed to the HSCA not by any neuroscience specialist, but by a wound ballistics expert based on his viewing old films of goats being shot in the head.

It is irrelevant who presented the film. The film makes it clear that the Neuromuscular Spasm does occur with goats. There is no reason to assume it wouldn’t happen with humans as well.

Unlike Dr. Mantik, I do not assume the Neuromuscular Spasm is true or false. Initially, I did not believe in it. But when it became clear to me that JFK’s head did not move at a constant speed backwards, but acceleration from 0 to 2 mph, not instantly, but over the course of a quarter second, it became apparent to me that the Neuromuscular Spasm is the only possible explanation. The Frontal Bullet Hypothesis does not explain this. The Jet Effect Hypothesis does not explain this. There was not nearly enough acceleration of the limousine to account for that (it only gained 0.1 mph during z313-z318, not 2.0 mph in speed). If the Neuromuscular Spasm is rejected out of hand, then we have no explanation for the quarter of a second acceleration of JFK’s head. Which is unacceptable.

It was the evidence, the Zapruder film, William Hoffman’s careful study of the Zapruder film, that compelled me to accept the Neuromuscular Spasm Hypothesis. Not an arbitrary assumption on my part.



Quote
To date no official testimony has been obtained from appropriate specialists (the neuroscientists) on this question. At the very least, interspecies differences in neurophysiology would leave this conclusion open at least to some doubt.

But insufficient reasons to reject this hypothesis out of hand, as Dr. Mantik and you do. Just because it occurs in goats, but might not in humans, is no reason to reject it out of hand.



Quote
In addition, the usual reaction to such brain trauma is not the highly directed movement observed in the Zapruder film but rather random muscular activity.

But it doesn’t matter if Dr. Mantik thinks that, in theory, if such a Neuromuscular Spasm occurred, the muscle activity would be random. The goat film does not show random movement. It shows the goat movement governed by its stronger muscles. The muscles that work against gravity are generally stronger than those that work with it. Hence the forelimbs swing forward and up. The hindlimbs swing backwards and up. The back arches. The movements on the right half of the body are mirrored by what happens on the left.



Question

Should we conclude that if a goat experienced such a Neuromuscular Spasm, that it’s muscle movement would be random, because Dr. Mantik thinks it would be if it occurred?

Or should we be guided by what the film shows, and conclude the movement of the goat would be quite predictable and the stronger muscles would rule?

Which is the more reasonable approach




The goat’s movements were not random, nor was JFK’s. The stronger muscles are on the back on the body, not the front, on a human. We would expect that if a Neurological Spasm, if it happens, it would cause JFK’s head to go backwards, as it did. We would expect JFK’s back to arch like it did with the goat, and also did with JFK, causing his torso to go back. We would expect his arms to raise up, which it did, like the goat’s forelimbs rose up. And we would expect this to start happening within 55 milliseconds, as it did with the goat, and also with JFK.

The Neuromuscular Spasm Hypothesis matches what happens to JFK to a ‘T’. It even explains why the acceleration of the head took place over a quarter of a second, as more and more muscles get activated by the spurious signal sent down the spinal cord. And not within a millisecond, as would be the case if the head was pushed by a frontal bullet.


Quote
Even Alvarez concluded that the highly directional recoil seen in the Zapruder film required the application of an external force.

Answered before and will answer again. Dr. Alvarez was a physicist, a great physicist, which Dr. Mantik is not, and never will be. And so, Dr. Alvarez would naturally look to explanations in Physics, not in Biology.


Quote
Yet another objection to the decerebrate rigidity invoked by the HSCA is the time of onset; even the HSCA admitted that this would develop only after several minutes.

Really? The HSCA thought the decerebrate rigidity explained JFK’s backwards head movement, but did not realize that the head movement happened immediately after the head shot. They thought the movement happened several minutes later?

Why would the HSCA think the effects of a Neuromuscular Spasm would be delayed by several minutes, when it occurred immediately with the goat?

Is Dr. Mantik nuts? Or misrepresenting what the HSCA thought?



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I have been unable to find any literature references that even hint that this reaction could occur within milliseconds in human subjects-as is required for the head snap as seen in the film.

How many times do doctors observe someone being shot in the head with a rifle bullet? How many times do doctors study films of people being shot in the head with a rifle bullet? Never. So, even if the Neuromuscular Spasm Hypotheses is true for humans, how many times would we expect to see literature references to it? Never.



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Furthermore, in a large collaborative study (A.E. Walker, Cerebral Death, 1981, p. 33) with over 500 patients who experienced cerebral death, 70% were limp when observed just before death and an additional 10% became limp at about the time of death. At the very least, therefore, based on all of these considerations, the attempt by the HSCA to implicate a neuromuscular reaction is open to serious doubt. Moreover, the minimum requirement has never been met-the appropriate experts have never been officially consulted.

Yes, we should assume that being shot through the brain with a rifle bullet would have the same effect on a person as who experiences a more peaceful cerebral death. People who die from a cerebral death, or from diabetes, or from cancer don’t experience a Neuromuscular Spasm, so why should we think that people killed by rifle bullets should react any differently?

Just because one is a doctor, does not mean that one cannot be an idiot, in certain ways.



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Moreover, the minimum requirement has never been met-the appropriate experts have never been officially consulted.

And the minimum requirements are for a person to be filmed while being shot through the brain with a rifle bullet. And having the appropriate experts study the film. A study that will never allowed to take place and can never take place.

None of this justifies assuming that the Neuromuscular Spasm Hypothesis can’t be true for humans.



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An additional argument against a neuromuscular reaction is that the observed reaction in the film is much too fast to fit with such a reflex. By the analysis of more than one study, within the space of one Zapruder frame interval (55 msec), the head clearly moves backward. Typical human reflex times are 114 to 112 second (250 to 500 msec). This is an extraordinary discrepancy-a factor of 5 to 10, which, all by itself, makes this scenario quite unlikely. (Assassination Science, pp. 281-282, PDF copy available online at https://www.krusch.com/books/kennedy/Assassination_Science.pdf)

But the goat starts to move its body 40 ms after being shot. So, if the Neuromuscular Spasm is also true in humans, as it is in goats, we would expect it would be a fast reaction too, and should started within 55 ms, as we observe in the Zapruder film.



It should be noted that Dr. Mantik’s judgment is highly questionable, and this is not only apparent from the quotes you provided. In books he helped write, he argues that the Zapruder film and the other films were faked. And faked well enough to not contradict each other. And somehow the conspirators got control of all the films and photographs, so they wouldn’t get trip up by a film they didn’t know about.

And Dr. Mantik collaborated with Dr. James Fetzer. They wrote books together. A more disreputable person to collaborate with is hard to imagine. Surely, Dr. Mantik’s judgement is questionable.



I have taken pains to answer every point you bring up, which is a lot of points. While you dodge almost all my questions, though I only make a comparative few.

So just answer the one highlighted question I have earlier in this post, and my Question 5 from my last two posts which I will repeat again here:

Question 5:

And the most important question of all. Do you believe a bullet only transfers momentum to a target while it is passing through the target?

Or do you believe a bullet can continue to transfer momentum to a target even after it’s left the body. Accounting for the gradual increase of speed of JFK’s backwards from 0 mph to 2 mph over the course of a quarter of a second.



This is a question you dodge because if you answer, yes, the bullet can still continue to transfer momentum to a head after it passes through it, you will sound like an idiot.

But if you say it couldn’t, then you have no explanation for JFK’s head acceleration lasting for a quarter of a second from z313 through z318.

JFK Assassination Forum

Re: A Question About Dr. Robert Zacharko.
« Reply #12 on: June 25, 2020, 05:15:05 PM »


Offline Michael T. Griffith

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Re: A Question About Dr. Robert Zacharko.
« Reply #13 on: June 25, 2020, 07:26:01 PM »
It is irrelevant who presented the film. The film makes it clear that the Neuromuscular Spasm does occur with goats. There is no reason to assume it wouldn’t happen with humans as well.

And on that note of resumed quackery, I think I need to stop wasting time trying to reason with you. There is no "assumption" that goat and human neuromuscular reactions will not be the same: we know from science, as Dr. Riley and Dr. Mantik have pointed out, that goat and human neurobiology and neurophysics are different. We also know from science that no human neuromuscular reaction is going to be fast enough, much less strong enough in such a localized manner, to cause the split-second and powerful reversal of motion we see with Kennedy's head and torso in the Zapruder film.

I'm sorry, but I'm just not going to waste any more time on this nonsense. As Zacharko says, the neuromuscular-reaction theory is "simply nonsense."


Offline Joe Elliott

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Re: A Question About Dr. Robert Zacharko.
« Reply #14 on: June 25, 2020, 07:58:27 PM »

And while I was not afraid to answer each of your many points, you are afraid to answer my comparatively few questions. So, you dodge them by saying you have grown tired of the conversation. Because you have no good answers.

JFK Assassination Forum

Re: A Question About Dr. Robert Zacharko.
« Reply #14 on: June 25, 2020, 07:58:27 PM »


Offline John Iacoletti

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Re: A Question About Dr. Robert Zacharko.
« Reply #15 on: June 26, 2020, 12:36:40 AM »
It should be noted that Dr. Mantik’s judgment is highly questionable, and this is not only apparent from the quotes you provided.

“Mantik doesn’t believe the things that I believe, therefore his judgment is questionable.”

 ::)