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CISDOC database

Document ID (ISN)54116
CIS number 90-1343
ISSN - Serial title 0095-6562 - Aviation, Space, and Environmental Medicine
Year 1989
Convention or series no.
Author(s) Bunnell D.E., Horvath S.M.
Title Interactive effects of heat, physical work, and CO exposure on metabolism and cognitive task performance
Bibliographic information May 1989, Vol.60, No.5, p.428-432. Illus. 10 ref.
Abstract The simple and interactive effects of carbon monoxide (CO) exposure and prior physical work on cognitive performance were evaluated in 16 subjects in two hot (WBGT = 30░C) environments. Three levels of carboxyhaemoglobin (COHb) (0, 7, 10%) and three workloads were crossed resulting in 9 repeated measures conditions per subject. Following administration of CO, subjects either exercised or rested for 50min, then performed five cognitive tasks. The only cognitive impairment associated with an elevated COHb was seen in performance of the second of two sequentially presented Stroop test versions using the same stimuli but with competing instructions. Heat exposure per se had no significant effects on cognitive performance based on comparisons with controls in a thermoneutral environment. Elevated COHb was associated with greater reporting of exertion and eye, ear, nose, and throat symptoms during heavy exercise concomitant with greater minute ventilation and heart rate. Except for the latter, these effects were not seen in thermoneutral conditions.
Descriptors (primary) cognitive performance; hot workplaces; work at high temperature; carbon monoxide
Descriptors (secondary) neurological effects; WBGT index
Document type D - Periodical articles
Subject(s) Heating, ventilation and climate
Broad subject area(s) Physical hazards
Browse category(ies) Heat and cold
Carbon monoxide
Inorganic substances