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.
Organ of Corti. (inside cochlea) organ located in the cochlea; contains receptors (hair cells) that receive vibrations and generate nerve impulses for hearing -------sense organ of hearing; runs along length of basilar membrane; consists of hair and support cells that react to the traveling wave. î î î.----- Sensorineural deafness: caused by the impairment if hair cells in the cochlea or damage of the cochlear branch of the vestibulocochlear nerve. -------Conduction deafness: caused by impairment of the outer and middle ear mechanisms for transmitting sounds to the cochlea.