Adrenergic innervation of the eighth nerve and vestibular end organs in man.

Fluorescence microscopy was used to examine the adrenergic, blood-vessel-independent innervation of the 8th nerve and inner ear specimens in patients with otoneurological diseases. Specifically fluorescent adrenergic axons were scantily seen among the myelinated nerve fibers in the 8th nerve and in the subepithelial regions of the end organs but not in the endolymphatic sac.