NEUROLOGICAL INFLUENCE IN PUSH-PULL EFFECT

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Authors
  1. Banks, R.D.
  2. Goodman, L.S.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
During straight and level flight, aircraft occupants are exposed to the normal acceleration force of gravity, that is +1 Gz. Evolutionary development of homeostatic control of blood pressure (BP) via neurological and cardiovascular mechanisms occurred under the continuing influence of +1 Gz during walking or sitting. Thus, humans have not yet evolved mechanisms to compensate for significant excursions from +1 Gz. Aircraft occupants are frequently exposed to short duration accelerations other than +1 Gz (12). Air turbulence, for example, exposes occupants to short (up to 0.5s) exposures to + or - Gz. Coordinated banked turns in jet aircraft expose occupants to sustained increases in +Gz. Nose-down, or 'bunt' maneuvers expose occupants to relative -Gz (that is, Gz that is less than +1 Gz).
Keywords
G-Induced Loss of Consciousness (G-LOC);Positive Pressure Breathing (PPB);Push-pull effect
Report Number
DCIEM-95-P-28 — Paper
Date of publication
01 Oct 1995
Number of Pages
12
DSTKIM No
98-00089
CANDIS No
506686
Format(s):
Hardcopy;Document Image stored on Optical Disk

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