A biopsy specimen of the motor nel ve to the gracilis muscle was obtai
ned in 151 patients to aid in the diagnosis of neuromuscular disorders
. The procedure is simple. safe. and has low morbidity and complicatio
n rates. The surgical technique is described. Indications for the use
of this technique are motor neuropathy. motor neuron disease. Guillain
-Barre syndrome. and mixed neuropathy with prominent motor symptoms.