The argument I'm putting forward is extremely simple.
It is an explanation for the unbelievably rapid movement of JFK's
left armIn z224 his
left arm is down by his side:
Eight Z-frames later (z232) his
left arm has extended upwards to a very extreme position:
This movement takes place in approximately 0.44 seconds.
In this fraction of a second JFK's
left arm has gone from a resting position down by his side to a position where his left elbow is extended upwards to, what appears to be, it's fullest extent.
The rapidity of this movement is indicative of a reflex reaction to a stimulus of the nerves controlling the function of the arms. These nerves are collectively known as the Brachial Plexus. It is no coincidence that the bullet which passes through JFK, passes through the Brachial Plexus at the approximate position represented in this graphic by the red dot:
Artwohl makes the following point:
“JFK’s reaction to the neck wound was, for all intents and purposes, instantaneous to the hit at Z-223/224. As the bullet passed through his neck, the pressure cavity caused an immediate and wide spread stimulation of all the nerves in the immediate vicinity, that is of the brachial plexus, the large group of nerves that emerge from C5-T1. These are the nerves that supply motor function to the arms.”The measurable, extremely rapid movement of JFK's left arm is evidence the nerves of the Brachial Plexus were damaged by a bullet that passed through this large group of nerves. This damage may have been caused by the bullet itself, severing a nerve, and the effect of cavitation, which may have contributed to further stimulation of the nerves.
In a recent post Brian Roselle posted this excellent article supporting the notion of JFK having an almost instantaneous reflex reaction to a shot passing through the Brachial Plexus, causing damage to the nerves specifically controlling motor function:
https://sites.google.com/view/spastic-paralysis/homeThat we can see JFK's left arm still down by his side as he emerges from behind the Stemmons sign indicates this reflex reaction has yet to begin.