RT Journal Article SR Electronic T1 Action tremor with alternating activity in antagonist muscles JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 151 OP 151 DO 10.1212/WNL.34.2.151 VO 34 IS 2 A1 Amin F. Sabra A1 Mark Hallett YR 1984 UL http://n.neurology.org/content/34/2/151.abstract AB Action tremors due to alternating activity in antagonist muscles create different clinical manifestations. Tremors range in frequency from 2.5 to 7 Hz and may be brought out by either posture or goal-directed movement. Using physiologic criteria, tremors can be divided into groups with possible pharmacologic implications.