Talk:Equilibrioception

Unification Aspects:

Equilibrioception, or the sense of balance, is so important that some believe it was among the first senses to appear in the history of life. Without the sense of balance, a person could not even walk.

What is remarkable is the complex coordination involved in this sense of balance. For example, the vestibulo-ocular reflex (VOR) is a reflex eye movement that stabilizes images on the retina during head movement by producing an eye movement in the direction opposite to head movement, thus preserving the image on the center of the visual field. When the head moves to the right, the eyes move to the left, and vice versa. Since slight head movements are present all the time, the VOR is very important for stabilizing vision. The VOR reflex does not depend on visual input and works even in total darkness or when the eyes are closed.

Furthermore, the vestibular system in humans coordinates with other senses (the visual system and proprioception) and parts of the body (nerves, brain, and so forth).

The vestibular system first appeared 300 million years ago and has hardly changed. Although it is easy to propose such a system developing by chance or by natural selection over million of years, it is hard to actually imagine such a complex and coordinated system having developed by means other than design, nor the basic system remaining virtually the same since then if natural selection were the main directive force in the origin of new designs.

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