Statistical Analysis of the Human Strangulation Experiments: Comparison to +GZ-Induced Loss of Consciousness.
Final rept. Feb 1991-Feb 1992,
NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA AIR VEHICLE AND CREW SYSTEMS TECHNOLOGY DEPT
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In 1943, Rossen, Kabat, and Anderson RKA, published the results of their investigations involving acute arrest of the cerebral circulation in man. Their studies on the effects of brief periods of cerebral ischemia have become a classic reference in a wide variety of scientific publications including those related to acceleration induced loss of consciousness G-LOC. An accurate quantitative kinetic comparison of the RKA data and data from G-LOC could provide information concerning the possible similarities andor differences in the mechanisms of the two phenomena. To this end, we attempted to relate the RKA work with current G-LOC theory by re-analyzing the RKA data in such a way that quantitative comparisons could be accomplished. The induction time for RKA loss of consciousness LOC was 6.4 to 6.9 s and found to be similar to both the equivalent parameter in G-LOC research of 8.8 s, and the time at maximum Gz prior to LOC of 7.3 s. The RKA time from LOC to recovery was 5.9 to 6.4 s and shorter than the equivalent G-LOC parameter of 23.7 s. However, the predicted minimum G-LOC recovery time is 6.8 s. Further, the loss of consciousness syndrome encompassing numerous psychophysiologic symptoms are essentially equivalent for both types of insults. The results seem to suggest an analogous mechanism for LOC induction and recovery caused by strangulation RKA and Gz stress. Neurophysiology Unconsciousness Ischemia Gz Acceleration Strangulation Fighter Aviation.
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