Vestibular Responses to Sinusoidal Angular Acceleration Stimuli with Superimposed Offset Velocities

Download or read book Vestibular Responses to Sinusoidal Angular Acceleration Stimuli with Superimposed Offset Velocities written by Jorma I. Niven and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty subjects were exposed to a sinusoidal rotation stimulus of 0.025 cps and a peak velocity of 63 deg/sec, which was superimposed on a constant rotational velocity of 153 deg/sec clockwise (CW), 153 deg/sec counterclockwise (CCW), or 0 deg/sec. The phase lag of nystagmus and sensation directional transitions was determined and used to derive a functional index, 2zeta/omega sub n, equivalent to the Pi/delta index obtained by conventional cupulometry. Nystagmus-based values were found to be independent of the base velocity and its direction. The phase lag of the CCW-to-CW transition in sensation of turning increased with a CCW offset velocity and decreased with a CW offset. The opposite effect was observed for a CW-to-CCW transition. (Author).