Task-control of arousal and the effects of repeated unidirectional angular acceleration on human vestibular responses.

Details

• Creators:
  Collins, William E.
• Corporate Creators:
  Civil Aeromedical Research Institute. Aeronautical Center
• Subject/TRT Terms:
  • Aviation medicine
  • Air pilots
  • Perception
  • Depth perception
  • Distance perception
  • Visual perception
  • Eye
  • Eye fixations
  • Eye location
  • Eye movements
  More +
• Publication/ Report Number:
  AM 63-29 ; DOT/FAA/AM-63/29
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Civil Aerospace Medical Institute
• Abstract:
  Subjects were exposed to a 10-day habituation series of 200 CW accelerations in total darkness while performing attention-demanding tasks. Decelerations were sub-threshold. Preliminary and post-tests indicated that slow-phase nystagmus and duration of the ocular response declined bidirectionally as a function of the habituation trials, but frequency of nystagmus increased during stimulus period and for a few seconds thereafter. These changes were approximately equal for both CW and CCW stimulation. ; Measurements of subjective velocity were obtained during several pre- and post-trials but never during the habituation series. A decline in the intensity of the sensation to CW acceleration, but not to CCW stimulation, was produced by the habituation series. A second post-test given after one month with no intervening stimulation showed little or no restoration of nystagmus. However, the subjective reaction demonstrated a clear, albeit incomplete pattern of recovery.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20881/dot_20881_DS1.pdf
• File Type:
  [PDF - 1.24 MB]
• Collection(s):
  US Transportation Collection ; FAA Civil Aerospace Medical Institute
• Main Document Checksum:
  urn:sha-512:cbefe7f12c5d1f3dc5ed8fa0145ea9d26871fb14b1829cdb15ace765f8dc6ec90284611ef3a640a0d02d620270aa7d906c6e4adbf471618f65b78991b444d6b5