Tinnitus is an auditory perception that can be described as the experience of sound, in the ear or in the head, in the absence of external acoustic stimulation.

An abnormal sensation of spinning while the body is actually stationary.

Deterioration or loss of the tissues of the cochlea.

A form of sensorineural hearing impairment with onset after the acquisition of speech.

Any structural anomaly of the vestibulocochlear nerve. The vestibulocochlear nerve consists of the vestibular and cochlear nerves, also known as cranial nerve eight (CN VIII). Each nerve has distinct nuclei within the brainstem. The vestibular nerve is primarily responsible for maintaining body balance and eye movements, while the cochlear nerve is responsible for hearing.