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Article
June 1968

Accessory Nerve: Conduction Studies

Author Affiliations

Denver
From the Division of Neurology, University of Colorado Medical Center, and the Electromyography Service, Mercy Hospital, Denver.

Arch Neurol. 1968;18(6):708-709. doi:10.1001/archneur.1968.00470360130014
Abstract

NERVE conduction studies are a valuable clinical tool in the localization and diagnosis of peripheral nerve lesions. Many of the cranial nerves are too deeply situated for the clinical application of this test. However, two cranial nerves can be rather easily studied: the seventh and the eleventh. Conduction time changes have been helpful in early detection of external compression of the seventh nerve. A search of the American and English literature has revealed several papers dealing with conduction measurements in diseases of the facial nerve1-3 but no electrical conduction time data on the accessory nerve. The purpose of this report is to present normal accessory nerve conduction times and also to present a case where the latency was prolonged.

Report of a Case  The patient is a 57-year-old design engineer who gave a chief complaint of "loss of voice" which began six years previously. The patient use

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