Definition of cocaine. : a bitter crystalline alkaloid C17H21NO4 obtained from coca leaves that is used especially in the form of its hydrochloride medically as a topical anesthetic and illicitly for its euphoric effects and that may result in a compulsive psychological need.
The inner hair cells transform the sound vibrations in the fluids of the cochlea into electrical signals that are then relayed via the auditory nerve to the auditory brainstem and to the auditory cortex.
Trochlear nerve. This nerve supplies somatic motor fibers to/and carries proprioceptive fibers from the superior oblique eye muscle. Trigeminal Nerve. The Opthalamic Division - Conveys sensory impulses from the skin of the anterior scalp, upper eyelid, nose, nasal cavity mucosa, cornea and lacrimal gland. The Maxillary Division - Conveys sensory impulses from the nasal cavity mucosa, palate, upper teeth, skin of the cheek, upper lip, lower eyelid.