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The hand was fixed in a myograph, which measured the force of wrist flexion. The myograph was mounted on a rotating disk over the joint axis, allowing wrist flexion and extension. Surface EMG recordings from the flexor carpi radialis allowed measurement of the response to each of the test stimuli (tendon tap, surface stimulation of the median nerve proximal to the elbow, transcranial magnetic stimulation, transmastoid electrical stimulation).
