COLDEX-86. Event-Related Potentials after Prolonged Cold Water Immersion: Possible Evidence for Impairment of Cognitive Function with Minimal Lowering of Core Temperature
Technical rept. Apr-Oct 1986
NAVAL MEDICAL RESEARCH INST BETHESDA MD
Pagination or Media Count:
Mild hypothermia may be associated with defects in mental performance, including changes in memory and reaction time. The P3 is an electrical response of the brain to unexpected stimuli, and the delay from stimulus to P3 occurrence P3 latency is related to reaction time. The P3 latency was measured in divers undergoing rewarming following extended exposure to water at 5 C and correlated with rectal temperature. There is a very significant lengthening of P3 latency related to rectal temperature in the ranges of 37 to 35 C, suggesting the possible existence of mental impairment even with minimal bodily cooling.
- Medicine and Medical Research