Idiopathic inflammation of the vestibular nerve, characterized clinically by the acute or subacute onset of vertigo; nausea; and imbalance. The cochlear nerve is typically spared and hearing loss and tinnitus do not usually occur. Symptoms usually resolve over a period of days to weeks. (Adams et al., Principles of Neurology, 6th ed, p304). The disease is vestibular neuronitis (MONDO_0006008). Also known as: epidemic neurolabyrinthitis, vestibular neuritis.