The sensory component receives input from the sensory organs while the motor nerves control the tube feet and musculature.

In 1910, he theorized that nerves control health.

The vascular nerves control vasodilation and vasoconstriction, which in turn lead to the control and regulation of temperature and homeostasis.

These nerves control the muscles of the face and neck and are involved in facial expression, mastication, swallowing, and other functions.

Three nerves control the eye muscles.