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Electrophysiologic Reappraisal

Steven A. Jerrett, MD; Louis J. Cuzzone, MD; Bartholomew M. Pasternak, MD

Arch Neurol. 1984;41(9):960-963.

Abstract
• Eighteen patients with thoracic outlet syndrome (TOS) were examined with somatosensory evoked potentials (SEPs). All the patients had normal median N9 (brachial plexus) amplitudes, whereas 12 had low-amplitude ulnar N9 potentials. The conduction in the ulnar nerve from N9 to N13 (brachial plexus to cord) was prolonged in seven of 18 patients. The combination of the ulnar N9 amplitude, the ulnar N9 to N13 conduction, and routine ulnar F-wave determination yielded positive quantitative diagnostic information in 17 of 18 cases. The SEPs appear to be a reliable, sensitive, quantitative, and noninvasive diagnostic tool in examining patients with TOS.

Author Affiliations
From the Departments of Neurology (Drs Jerrett and Cuzzone) and Surgery (Dr Pasternak), Norwalk (Conn) Hospital, and the Yale University Medical School (Drs Jerrett and Pasternak), New Haven, Conn.

Footnotes
Accepted for publication Dec 1, 1983.

Reprint requests to Departments of Neurology and Surgery, Norwalk Hospital, Norwalk, CT 06856 (Dr Jerrett).

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES

Somatosensory Evoked Potentials in Thoracic Outlet Syndrome
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Arch Neurol 1985;42:1036-1036.
ABSTRACT