Accession Number:

ADP006100

Title:

Detection of Acceleration (+Gz) Induced Blackout by Matched-Filtering of Visual Evoked Potentials,

Descriptive Note:

Corporate Author:

NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA

Report Date:

1988-02-01

Pagination or Media Count:

13.0

Abstract:

In air-combat-maneuvering and on human centrifuges, moderate levels of positive acceleration Gz, coupled with moderate rates of onset, produce visual symptoms which are ordinarily progressive Decreasing visual sensitivity, dimming of the visual field, peripheral light-loss, and central light-loss black-out. Since these symptoms provide commonly used tolerance end point in acceleration research. In order to provide an objective indication of the integrity of the visual system, we have developed a method for real-time monitoring of the steady-state visual evoked potential VEP. Since significant degradation of visual functioning must be recognized in approximately three seconds, we required a previously unattained efficiency in producing and measuring the VEP. Using the Fast Fourier Transform FFT, we developed a noise matched filter, with evaluation only at the expected response peak. js

Subject Categories:

  • Psychology
  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE