Ear and ear canal anomalies are also related to this structure of the ear and are known to be associated with sensorineural hearing loss and conductive hearing loss. Vertigo refers to the inappropriate perception of motion. This is due to dysfunction of the vestibular system. One common type of vertigo is benign paroxysmal positional vertigo, when an otolith is displaced from the ventricles to the semicircular canal. The displaced otolith rests on the cupola, causing a sensation of movement when there is none. Ménière's disease, labyrinthitis, strokes, and other infective and congenital diseases may also result in the perception of vertigo.
Stereocilia (inner ear) in humans. In order to correct this mutation, researchers injected a gene therapy containing the corrected gene into the inner ear of mice with the genetic mutation. The therapy restored stereocilia to normal lengths and eliminated the additional rows of stereocilia in newborn whirler mice. Despite the restoration of hair cells, the treated whirler mice exhibited no signs of improved hearing ability following testing after one month and after three months of treatment. Further studies are looking to understand why the restoration of the stereocilia did not improve the hearing ability of the mutated mice. Sound at a certain decibel