Rheoencephalography in Simulated Aviation Environmental Stress
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 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, Zb, that is referable to the bulk movement of blood in and out of the head, and (2) a pulsatile impedance waveform that is heart beat coincident. The REG waveform also 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 arena in which to alter cephalic fluid volumes noninvasively in order to obtain basic physiologic knowledge of importance to both aviation and clinical medicine. (KT)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA221150
Entities
People
- Barry S. Shender
Organizations
- Naval Air Warfare Center Warminster