RT Journal Article SR Electronic T1 The acoustic startle reflex in stiff‐man syndrome JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 1952 OP 1952 DO 10.1212/WNL.44.10.1952 VO 44 IS 10 A1 Joseph Y. Matsumoto A1 John N. Caviness A1 Kathleen M. McEvoy YR 1994 UL http://n.neurology.org/content/44/10/1952.abstract AB We studied the EMG response to loud noise in eight patients with stiff-man syndrome (SMS). Audiogenic muscle jerks originated in the acoustic startle reflex. Patients demonstrated excessive, poorly habituating motor activity predominately in axial and leg muscles. Exaggerated startle in SMS probably reflects segmental hyperexcitability of axial and lumbar spinal motor neurons.