VESTIBULAR RESPONSES TO SINUSOIDAL ANGULAR ACCELERATION STIMULI WITH SUPERIMPOSED OFFSET VELOCITIES,

Abstract

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)

Document Details

Document Type
Technical Report
Publication Date
Apr 02, 1969
Accession Number
AD0690099

Entities

People

  • Jorma I. Niven
  • W. Carroll Hixson

Organizations

  • Naval Aerospace Medical Institute

Tags

DTIC Thesaurus Topics

  • Angular Acceleration
  • Directional
  • Motion
  • Nystagmus
  • Physical Properties
  • Rotation
  • Sensation
  • Transitions

Readers

  • Aerodynamics/Aeronautics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience