FIG 2.

Patient 2: multichannel surface electromyogram recording after a tap to the nose. Bottom channel represents accelerometer attached to finger. Note the sweep duration 100 milliseconds per division. Initial movement represents finger withdrawal, with tap occurring at the peak of the curve (as marked). The earliest onset of electromyogram response is seen in the SCM with a latency of 20 milliseconds followed with spread to the rostral and caudal muscles. ADM, abductor digiti minimi; L, left; Orb, orbicularis; PS, paraspinals; SCM, sternocleidomastoid.