THE DOUBLE CRUSH IN NERVE-ENTRAPMENT SYNDROMES

A comprehensive electromyographic study has been made of 115 patients with carpal-tunnel syndromes or lesions of the ulnar nerve at the elbow. In 81 cases there was electrophysiological evidence, often supported by clinical symptoms, of associated neural lesions in the neck. This association is not thought to be fortuitous, but rather the result of serial constraints of axoplasmic flow in nerve fibres.