Decerebate posture and Opisthotonos both have the same characteristics as JFKs movement (body arching backwards), both occur due to violent brain trauma, and they would explain why the rearward motion doesn't even begin until 1/9th of a second after the headshot.
Who says it begin 1/9th of second after the bullet hit the head?
Multiple experts in brain trauma and wound ballistics have looked at JFKs motion after the headshot and found that it was likely due to Decerebate posture, Opisthotonos or some other severe neurological reaction.
Multiple? Have any of them explained the minimum delay time in decerbrate reflexes? Any number here?
Conversely, no ballistic expert believes the rearward motion was caused by a half ounce bullet, because outside of Hollywood action movies, half ounce bullets fired from a hundred yards away do not possess the kinetic energy to throw around a 200 pound human being.
No one is claiming that a 200 pound body is violently snapping back and to the left. The claim is that JFK’s
head is snapping back and to the left when hit by an incoming bullet from in front to the right. A reasonable hypothetical example:
- A .30-30 rifle has a muzzle velocity of 2200 ft/second and fires a 170 grain bullet weighing 0.024 pounds. Almost the same as a Carcano.
- The distance between the picket fence and the limo was 30 yards which gives a velocity of 2100 ft/sec when hitting the target = momentum on impact of 50ft-lb/sec.
- If using a soft point hunting bullet which typically mushrooms on impact, a reasonable transfer of momentum would be, lets say, 80% = 40 ft-lb/sec
- Average male head size for JFK’s body hight is 12 pounds, max 15 pounds.
- The velocity imparted on his head if weighing 12 pound would be 3.3 ft/sec and if weighing 15 pounds, it would have been 2.6 ft/sec.
- His head is moving in between Z313 - Z321 a total of 8-1/2 inches in 4/9th of second with a velocity of 1.6 ft/sec.
Well within the range of the involved parameters.
No Hollywood needed.
The initial snap forward,
- Could be a second bullet from behind.
- Could be the limo decelarating.
the path of the debris field,
The visible debris is traveling straight up/slightly forward which is caused by the Kronlein-Shuss effect.
the intact rear of the head in every available image,
There are to my knowledge only one photo that shows the back of the head after the assassination and that looks like it have been taken after the restoration of his body for the funeral.
The Zapruder film do not show the back of the head in any detail. It is covered in black shadow during the whole sequence and there is suspicions that the black patch is not a natural shadow but instead painted on after the film left Dallas.
In the case of the x-ray-images they have to be fabricated. There is no other reasonable explanation.
the neurological explanation for JFKs rearward movement,
I’m still waiting for a more detailed explanation, delay time included.
the authenticated x-rays,
The content is not authenticated. The film used is not authenticated. No one in the HSCA medical panel had the expertise to look for signs of forgery.
the authenticated autopsy photos,
Same here + that the camera used by the autopsy photographers did not match the photos at NARA.
Written by Humes after burning his original papers after Oswald was killed. Does not confirm the x-rays in describing an entrance wound slightly above the EOP with a debris field in the lower part of the right brain vs. the x-rays showing a debris field in the uppermost part of the same right brain.
Doesn’t mention a big metal fragment in the cowlick area ca 10 cm above the original entrance wound. It shines like a lighthouse in the x-rays but the x-ray doctors missed it? Much bigger and brighter than anything else they found?
And most important, when questioned by the ARRB and asked to clearify their original drawings of the headwounds they admitted that the big wound on the right top of the head extended all the way down to the EOP.
Dr. Boswell described in detail that they did not identitify the entrance wound at the EOP until additional bone fragments were brought in to the autopsy and that they discovered the little ”bullet hole” when putting the pieces together.
The Harper fragment found in the grass south of Elm Street the day after the assassination. 7x5 cm cranial occipital bone = lower back of the head. According to the three forensic pathologists at Methodist Hospital in Dallas who photographed it, wrote their report and gave it all to to the FBI never to be seen again. Only the photographs remains and their analysis has been confirmed by other experts in the field.
There are no ”pieces” in the back of the head in the x-rays. No big wound extending all the way down to the EOP.
It is completely undamaged. In the x-rays. How come?
and the findings of multiple panels of forensic pathologists all lead to one inescapable conclusion. The grassy knoll shot is a work of fiction.
They were drawing their conclusions in the belief that the images at their disposal was authenticated. They were not authenticated.
They were lied to.
