A Study of Early Greyout Threshold as an Indicator of Human Tolerance to PosiTIVE Radial Acceleratory Force

摘要

The purpose of this study was to investigate the relationship under increased positive radial acceleratory force between peripheral light loss and blackout or unconsciousness when the light stimulus is located at 80 degrees in the peripheral field; and to determine whether an 80 degree peripheral light stimulus was an earlier indicator than lights located at 23 degrees in the peripheral field. Under conditions of our experiment, it was found that an 80 degree light stimulus was an earlier indicator than the 23 degree light for an endpoint of greyout in regard to magnitude of the G force. The time spread between onset of greyout (80 degree light loss) and onset of blackout or unconsciousness was determined, and this time spread was found to be slightly increased when compared to the use of a 23 degree light as an endpoint of greyout. The peripheral light loss has limited usefulness as an early indicator for the onset of critical symptoms of blackout or unconsciousness. (Author)