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Otolaryngol Head Neck Surg (1979). 1979 Jan-Feb;87(1):89-94. doi: 10.1177/019459987908700122.

Why not the eighth nerve? Neurovascular compression--probable cause for pulsatile tinnitus.

Otolaryngology and head and neck surgery

S G Lesinski, A A Chambers, R Komray, M Keiser, G Khodadad

PMID: 503480 DOI: 10.1177/019459987908700122

Abstract

Carotid arteriograms on three patients with unilateral pulsatile tinnitus demonstrated an ipsilateral atypical trigeminal artery extending from the cavernous portion of the internal carotid artery to form the posterior inferior cerebellar artery. Illustrations and a dissection of a human fetus with a similar finding show this artery crossing the cochlear nerve near its insertion in the pons. Evidence is presented suggesting that neurovascular compression of the eighth nerve is the source of pulsatile tinnitus in these patients.

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