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Behavioral assessment of peripheral nerve function

Department of Psychology, University of Western Ontario, London, Ontario, Canada.

Behavioral psychophysical techniques were used to obtain strength-duration curves for the ulnar nerve at both threshold and suprathreshold levels. The functions well match those obtained with electrophysiologic procedures, but overcome many of the difficulties associated with traditional electrodiagnosis. An alternate means of presenting the data provides a parameter, the critical duration, that describes the ability of the stimulated nerve to integrate or summate energy over time. The very brief critical duration for normal ulnar nerve and the similar functions at threshold and suprathreshold levels suggest possible mechanisms for the transduction and coding of percutaneous electrical stimuli.

This work was supported by grant APA-392 from the National Research Council of Canada.

Received for publication September 27, 1974.

Dr. Rollman's address is Department of Psychology, University of Western Ontario, London, Ontario, Canada, N6A 3K7.