Table 6-1. Peripheral vs. central vestibular dysfunction

DISEASE

NYSTAGMUS

VERTIGO

ASSOCIATED SYMPTOMS

PHENOMENA

CALORIC IRRIGATION

Peripheral

Horizontal or rotatory; unidriectional

As severe as nystagmus

Hearing loss and tinnitus frequent

Long-tract sensory, motor involvement unusual

Depressed response

Central

Horizontal, rotatory or vertical; multi-directional

Relatively mild or absent

Tinnitus and hearing loss rare

Associated sensory, motor, cerebellar, other cranial nerve involvement more common

Variably affected and unreliable

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