Accession Number:

ADA184302

Title:

Characterization of the Resulting Incapacitation Following Unexpected +Gz-Induced Loss of Consciousness

Descriptive Note:

Journal article

Corporate Author:

SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Report Date:

1987-07-01

Pagination or Media Count:

6.0

Abstract:

Gz-induced loss of consciousness G-LOC results in incapacitation which can be characterized by the unconscious period absolute incapacitation and a subsequent period of confusiondisorientation relative incapacitation. The sum of the absolute and relative incapacitation periods represents the total incapacitation period and may be equated to the overall length of time a pilot would be in uncontrolled flight should G-LOC occur. Reviewing the centrifuge induced G-LOC episodes in 55 subjects allowed a detailed description of G-LOC. The absolute incapacitation period was 16.6 s with the subsequent relative incapacitation being 14.5 s resulting in an overall total incapacitation of 31 s. The G-LOC incapacitation was dependent on the rate of onset of the Gz-stress and the Gz level where G-LOC occurred. G-LOC episodes could be subdivided into 2 separate types Type I being shorter unconsciousness episodes without convulsive movements, and Type II being longer unconsciousness with more frequently associated dream states and convulsive type movements.

Subject Categories:

  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE