Erick Mead wrote:
...The body is a column that buckles in the middle. Weight shift is integral to balance -- along the line of the four legged stool with the two legs missing. It is an imperfect image hoever, because the tops and bottoms of legs of the stool are limited universal joints. Statically the whole apparatus should just teeter over to the side.
The thing that keeps us upright is a miniscule gyroscopic sway of the hips in a chaotic figure eight pattern that dampens the toppling sway caused by gravity.
Interesting theory.... but last time I checked, autonomic anti-gravity responses were controlled by the vestibular system - not by the rhythmic hypnoptic gyrations of the hips... :P
It doesn't explain how you can topple the entire structure at any of the major articulation points - foot, knee, hip, shoulder, elbow, wrist, head/neck - without "buckling the middle" - which may be the result of an autonomic anti-gravity response to maintain semi-upright equilibrium.