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Performance decrements under hyperbaric He-O2.
Fifteen divers performed five tasks in water of temperatures 20 degrees C and 5 degrees C, using standard scuba equipment. A significant deterioration of performance occurred under the colder conditio...
Diver temperature and performance changes during long-duration,cold water exposure
human temperature performance cold water immersion
2009/7/20
Diver temperature and performance changes during long-duration,cold water exposure
Left-ventricular performance in man during breath-holding and simulated diving
cardiovascular human breath holding
2009/7/20
We measured left-ventricular (LV) systolic time intervals (STI) to determine whether breath-holding and simulated diving evoke a depression of LV performance in man similar to that previously demonstr...
Assessment of vertical excursions and open-sea psychological performance at depths to 250 fsw
decompression nitrogen narcosis
2009/7/20
A series of 10 two-man descending vertical excursion dives was carried out in the open sea from an ocean-floor habitat off the coast of Puerto Rico by four aquanauts saturated on a normoxic-nitrogen b...
Longitudinal study of performance after deep compressions with heliox and He-N2-O2
human heliox trimix
2009/7/20
This study concerns three hyperbaric experiments. During SAGITTAIRE iv, compression to 610 msw was accomplished in 11 days with an atmosphere of helium-oxygen. For the two CORAZ experiments, compressi...
Narcotic potency of N2, A, and N2O evaluated by the physical performance of mouse colonies at simulated depths
animal mice narcosis nitrogen argon nitrous oxide
2009/7/20
The physical performance of colonies of deer mice was studied in various inert gas environments at pressures up to 31 ATA. The mice were housed in habitats wherein their diurnal running activity and s...
Hana kai ii:a 17-day dry saturation dive at 18.6 ATA.VI:Cognitive performance,reaction time,and personality changes
saturation human Cognition performance reaction time personality thermal stress
2009/7/20
Measures of spatial orientation, associative memory, general intelligence, arithmetic ability, reaction time, and personal/social perceptions were administered to five subjects during a 31-day saturat...
Distraction effect of cold water on performance of higher-order tasks
human performance cold water immersion
2009/7/20
Eight U.S. Navy-qualified scuba divers performed peripheral target detection and navigation problem-solving tasks continuously during 3-h exposures to moderate (15.5 degrees C) and cold (4.5 degrees C...
Operator performance in the one-atmosphere diving system JIM in water at 20 degrees C and 30 degrees C
human one-atmosphere Operator
2009/7/16
Performance and physiology of five operators of the one-atmosphere diving system JIM were assessed when diving JIM in mild (20 degrees C) and warm (30 degrees C) water. Each operator completed a minim...
Visual reaction time performance preceding CNS oxygen toxicity
human oxygen toxicity visual
2009/7/14
The visual reaction time performance of divers experiencing CNS oxygen toxicity was assessed during the development of closed-circuit 100percent oxygen breathing diving schedules at the U.S. Navy Expe...
Effects of transcutaneous scopolamine and depth on diver performance
transcutaneous scopolamine drug cognitive air performance
2009/7/9
Transdermal scopolamine is an effective anti-motion-sickness medication that has less CNS side effects at normal ambient pressure than orally ingested agents. To see whether it has an effect on perfor...
Mental performance during submaximal exercise in 13 and 17% oxygen
exercise hypobaric chamber performance cognitive Psychomotor
2009/7/9
Submarine crews live in atmospheres containing variable levels of O2 and CO2. Under these conditions, significant reduction of the O2 may impair mental function during physical exertion. Therefore, ps...
Effects of CO2 and N2 partial pressures on cognitive and psychomotor performance
CO2 carbon dioxide nitrogen narcosis cognitive psychomotor performance
2009/7/8
This study examined N2 and CO2 components of narcosis by comparing the effects of three levels of PETCO2 [low = 29 mmHg (SD = 4 mmHg), medium = 47 mmHg (SD = 1 mmHg), high = 57 mmHg (SD = 2 mmHg)] at ...
Effects of hyperbaric oxygen on aerobic performance in a normobaric environment
exercise hyperbaric aerobic performance gender
2009/6/8
The purpose was to examine the acute effects of a hyperbaric oxygen (HBO2) treatment on a) recovery following prolonged exercise and b) aerobic performance in a trained population. Subjects were six m...
