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From the NIH's Historical anatomies on the web: Ame Bourdon's Nouvelles tables anatomiques of 1678.

When we speak of "the nervous system" in Feldenkrais, we are referring loosely to the brain and peripheral nerves. But an image of the brain and peripheral nerves that carry signals to and from the brain rarely does justice to what we are talking about, because we are thinking of the nervous system in action, functionally: pathways of sensing, feeling, moving and thinking.

This image from Bourdon captures so much: on the left you see the sort of static image that will be repeated for hundreds of years after; on the right a dynamic person with eyes that look; not only the sensory-motor function of the nerves is captured, but also the circulatory system and the vegetative functions of the sympathetic nervous system with sweats and chills and heat rising from the body on its right.

Try Covering the eyes for a lesson that treats the eyes as both controlling and acting as a sensor for the overall state of excitation of the nervous system.