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Fb2 Actual and Perceived Cognitive Performance during Acute Altitude Exposure ePub

by Laura C. Terry

Subcategory: Different
Author: Laura C. Terry
ISBN: 1423524705
ISBN13: 978-1423524700
Language: English
Publisher: Storming Media (2001)
Fb2 eBook: 1340 kb
ePub eBook: 1977 kb
Digital formats: doc mobi mbr lit

The purpose of this study was to evaluate potential differences in actual and perceived cognitive performance at moderate altitude (10,000 ft and 14,000 ft) under several environmental conditions.

Actual and perceived cognitive performance during acute altitude exposure. Unpublished master’s thesis, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio. 19. Winder, . & Borrill, J. (1998). Fuels for memory: The role of oxygen and glucose in memory enhancement. Psychopharmacology, 136, 349-356. Publisher – Google Scholar. 20. Zhu, . Volkow, N. Ma, . Fowler, J. & Wang, . J.

Objectives: Cognitive dysfunction from high altitude exposure is a major cause of civilian and military air disasters. Pilot training improves recognition of the early symptoms of altitude exposure so that countermeasures may be taken before loss of consciousness. Little is known regarding the nature of cognitive impairments manifesting within this critical window when life-saving measures may still be taken. Prior studies evaluating cognition during high altitude simulation have predominantly focused on measures of reaction time and other basic attention or motor processes.

Objective: Expand understanding of the role of selected workplace exposures (ie, occupational comp. Conclusions: Objective assessments of physical and psychosocial exposures in the workplace are independently associated with cognitive outcomes in adulthood, with psychosocial exposures being particularly pronounced among women. Department of Family and Child Sciences, Florida State University, Tallahassee (Dr Grzywacz); Department of Gerontology, The University of Haifa (Dr Segel-Karpas); and Department of Psychology, Brandeis University, Boston, Massachusetts (Dr Lachman).

Relationships between symptoms, moods, performance, and acute . Subjective symptomatology and cognitive performance at high altitude.

Relationships between symptoms, moods, performance, and acute mountain sickness at 4700 meters. Aviation Space and Environmental Medicine 62: 865–869, 1991Google Scholar. Shukitt-Hale B, Rauch TM, Foutch R. Altitude symptomatology and mood states during a climb to 3630 meters. Perceptual and Motor Skills 31: 247–261, 1970PubMedGoogle Scholar. Medicine and Science in Sports and Exercise 14: 223–228, 1982PubMedGoogle Scholar.

High-altitude hypoxia impedes cognitive performance . It is not well known whether the prophylactic use of acetazolamide for altitude sickness can influence cognitive performance at high altitude. When ascending to high altitude locations, one may face medical risks, including cognitive impairment, which may significantly hinder climbing abilities or exploratory behavior. Effective prophylactic drugs have rarely been reported. Because acetazolamide is commonly used to treat acute mountain sickness (AMS), we assessed the potential effects of acetazolamide on cognitive performance during high-altitude exposure.

We find that long-term exposure to air pollution impedes cognitive performance in verbal and math tests

We find that long-term exposure to air pollution impedes cognitive performance in verbal and math tests. We provide evidence that the effect of air pollution on verbal tests becomes more pronounced as people age, especially for men and the less educated.

Acute Exposure Guideline Levels (AEGLs) set levels of chemical concentration that pose a defined level of risk to humans (the general population, including susceptible individuals). These levels are used in preventing and responding to disasters. These guidelines are ascertained for one, short exposure (with a maximum of eight hours) by the air. The AEGL values are determined for varying times of exposure, such as ten minutes, thirty minutes, one hour, four hours and eight hours.

Cold exposure in humans causes specific acute and chronic physiological responses. Acute physiological responses to cold exposure include cutaneous vasoconstriction and shivering thermogenesis which, respectively, decrease heat loss and increase metabolic heat production. Vasoconstriction is elicited through reflex and local cooling. In combination, vasoconstriction and shivering operate to maintain thermal balance when the body is losing heat.

This is a AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A224993. The abstract provided by the Pentagon follows: Observations by aviators and mountain climbers who attempt to ascend above 10,000 to 14,000 ft will often include references to impairments of cognitive abilities. Although known cognitive impairments occur at altitude, little has been done to research the perception of such decrements in performance. The purpose of this study was to evaluate potential differences in actual and perceived cognitive performance at moderate altitude (10,000 ft and 14,000 ft) under several environmental conditions. Ten subjects were exposed to each altitude condition on separate days and asked to perform a computer test, SYNWIN, while at rest at ground level (5,000 ft), at rest at altitude, after 10 minutes of exercise at altitude, and while breathing supplemental oxygen at altitude. Before and after each test at altitude, subjects were asked to provide pre- and post-test estimates regarding their performance on the cognitive test by rating their performance on a five-point scale, as compared to the most recently completed test. It was hypothesized that cognitive performance at 14, 000 ft would be worse than that at 10,000 ft, with the difference exacerbated after exercise, but then eliminated by supplemental oxygen. It was also hypothesized that over-confidence would also manifest itself, to degrees corresponding to the hypothesized decrements in performance. Actual performance on the test was significantly greater at 10,000 ft compared to both ground level and 14,000 ft while at rest. Performance at 10,000 ft was also significantly greater than that at 14,000 ft after exercise and oxygen supplementation.
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