nervimotion

from The Century Dictionary.

• noun The reflex action of the nervous system; motion excited in nerves by external stimuli and reflected in muscular motion.
• noun In botany, the power of self-motion in leaves.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Physiol.) The movement caused in the sensory organs by external agents and transmitted to the muscles by the nerves.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun physiology The movement caused in the sensory organs by external agents and transmitted to the muscles by the nerves.