Accession Number:

ADA513684

Title:

Cerebral Hemodynamics and Vigilance Performance

Descriptive Note:

Journal article

Corporate Author:

HUMAN EFFECTIVENESS DIRECTORATE WRIGHT-PATTERSON AFB OH 711 HUMAN PERFORMANCE WING

Report Date:

2009-01-01

Pagination or Media Count:

28.0

Abstract:

Five studies are described using transcranial Doppler sonography TCD and near-infrared spectroscopy NIRS to examine brain systems in vigilance. The results indicate that the vigilance decrement, the temporal decline that typifies vigilance performance, is paralleled by a decline in cerebral blood flow velocity as indexed by TCD. In addition, both measures showed greater activity in the right than in the left cerebral hemisphere in response to a variety of psychophysical challenges, indicating a right hemispheric system in control of vigilance performance. The TCD measure was also found to be potentially useful in selecting observers for vigilance assignments.

Subject Categories:

  • Psychology
  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE