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Author:
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ISBN:
Category : Alcohol
Languages : en
Pages : 24
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Book Description
Author:
Publisher:
ISBN:
Category : Alcohol
Languages : en
Pages : 24
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Author: William E. Collins
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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Book Description
Most studies of the effects of alcohol on human performance involve static (absence of motion) situations. However, the addition of motion, involved in such activities as piloting an aircraft, might well produce impairments not usually obtained in static situations. The present study examined some of the effects of alcohol ingestion on visual tracking performance (eye-hand coordination) during angular acceleration. Following practice and base-line tests of tracking performance in both static (stationary) and dynamic (whole body angular acceleration) conditions, 10 subjects received orange juice which contained 2.0 ml of 100-proof vodka per kg of subject weight; another 10 drank orange juice with a few drops of rum extract added. Tests, conducted 1, 2, 4, 8, and 10 hours after drinking, were in total darkness with the exception of the visual display which was illuminated to recommended levels for cockpit instruments. Static tracking errors for Alcohol subjects were significantly higher than those of Control subjects only at the 4-hour session. However, Alcohol subjects made significantly more dynamic tracking errors than Controls during the 1-, 2-, and 4-hour sessions. These data suggest that eye-hand coordination may show little or no impairment following alcohol ingestion in static situations, yet may be seriously degraded during motion. (Author).
Author:
Publisher:
ISBN:
Category : Alcohol
Languages : en
Pages : 12
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Author:
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ISBN:
Category : Air pilots
Languages : en
Pages :
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Author:
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ISBN:
Category :
Languages : en
Pages :
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Author: William Edward Collins
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ISBN:
Category : Airplanes
Languages : en
Pages : 34
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Book Description
Author: David J. Schroeder
Publisher:
ISBN:
Category : Alcohol
Languages : en
Pages : 40
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Author:
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ISBN:
Category :
Languages : en
Pages : 16
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Alcohol ingestion interferes with visual control of vestibular eye movements and thereby produces significant decrements in performance at a compensatory tracking task during oscillation about the yaw axis; significant or consistent decrements in performance in the absence of motion were not obtained. The present study was designed to extend knowledge about these effects to pitch-plane stimulation. Alcohol doses were 2.0 ml of Smirnoff vodka per kg of body weight and tests were conducted before drinking and one, two, and four hours after drinking. In the absence of motion, there was no difference between the groups in tracking error while subjects were in the pitch position; significantly more errors occurred for alcohol subjects in the yaw position one and four hours (but not two hours) after drinking. During motion, one and two hours after drinking, alcohol subjects performed significantly poorer than the non-drinkers and had significantly less control of their eye movements for both axes of stimulation. Absolute error was greater during all sessions for pitch-plane stimulation as compared with yaw-plane stimulation. These degrading effects of alcohol on performance, particularly evident during motion, are discussed from the viewpoint of aviation safety. (Modified author abstract).
Author: David J. Schroeder
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
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Book Description
The integrity of the visual and vestibular systems is important in the maintenance of orientation during flight. Although alcohol is known to affect the vestibular system through the development of a positional alcohol nystagmus, information concerning the effects of alcohol on 'vertigo' and eye-movement (nystagmus) responses to angular acceleration is contradictory. This study was designed to investigate the effect of alcohol ingestion on both 'vertigo' and nystagmus responses to angular stimulation. Responses were obtained (a) with and without visual fixation, and (b) with the alertness of the subjects controlled.
Author: Richard D. Gilson
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
A previous CAMI laboratory investigation showed that alcohol impairs the ability of men to suppress vestibular nystagmus while visually fixating on a cockpit instrument, thus degrading visual tracking performance (eye-hand coordination) during angular acceleration. Reduced display illumination, independently, has also been shown to degrade tracking performance during vestibular stimulation. The present study investigated the way in which low and moderate dosages of alcohol and two levels of instrument-display illumination combined to affect tracking performance (a) in a static (no motion) environment, and (b) in a dynamic (whole-body motion) environment. Mean blood alcohol levels as low as .027 per cent significantly decreased (P
