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Ulnar F‐wave conduction velocity in epidural metastatic root lesions
Author(s) -
De Visser Bram W. Ongerboer,
Van Der Sande Jaap J.,
Kemp Bob
Publication year - 1982
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.410110206
Subject(s) - ulnar nerve , medicine , nerve conduction velocity , f wave , wrist , anatomy , nerve root , elbow
In 40 controls and 19 patients with neoplastic lesions of the eighth cervical and first thoracic nerve roots confirmed by myelography, ulnar F‐wave conduction velocity (FWCV) was estimated using the shortest F‐wave latency (FWL). F‐waves were recorded from needle electrodes inserted in the abductor digiti minimi manus muscle after stimulation of the ulnar nerve at the wrist. Motor nerve conduction velocities of distal ulnar segments were normal. It was found that the ulnar FWCV decreases significantly with increasing age. This is not true for FWL. During the initial examinations ulnar FWCV was delayed in 18 patients. At follow‐up, ulnar signs correlated well with changes in FWCV. Low F‐wave frequency and wide FWL differences are also important features in ulnar root disease.