Effect of Body Posture on Vestibular Evoked Myogenic Potentials

VEMP recorded from surface electrodes over the tonically contracted sternocleidomastoid (SCM) muscle is a short latency biphasic electromyograms which evoked by high-level acoustic stimuli. Aim: To find the effect of posture and positioning on VEMP recording. Method: VEMP was recorded for 20 normal hearing subjects (18 to 20 years) with and no vestibular in both supine and sitting upright position with the head turned towards the contra lateral side of the stimulus. Results: Paired t test was used to compare the latencies of p1 and n1 in both positions. Statistical evaluation showed no significant difference in p1 (at t (19) =0.840, pgreater than0.05) and n1 (at t (19) = 0.468, pgreater than0.05) latencies in upright and supine position. Results of this study suggest that both supine a well as upright position can be used to record VEMP effectively.