Accession Number:

ADA257509

Title:

Application and Rheoencephalography to Study Physiological Responses Under Acceleration Stress.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE AND CREW SYSTEMS TECHNOLOGY DEPT

Personal Author(s):

Report Date:

1991-09-01

Pagination or Media Count:

87.0

Abstract:

The use of electrical impedance plethysmography of the head, or rheoencephalography REG, has been demonstrated in a high acceleration stress environment on human volunteer subjects. Acceleration stress was primarily applied in the head-to-foot direction and is referred to as Gz. The REG instrument divides the cephalic impedance waveform into two components 1 A baseline impedance signal, Zdc, that is referable to the bulk movement of blood in and out of the head caused by respiration and changes in posture, and 2 A pulsatile impedance waveform that is heart beat coincident Zpul. The REG waveform contains information about cerebrospinal fluid CSF volume changes and shifts resulting from the application of acceleration stress. Blood and CSF shifts in and out of the cranial and spinal compartments impinge directly upon the overall function of the central nervous system. The high acceleration environment provides an ideal area in which to noninvasively alter cephalic fluid volumes in order to obtain basic physiologic knowledge of importance to both aviation and clinical medicine.

Subject Categories:

  • Medicine and Medical Research
  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE