Measuring and predicting the effects of alcohol consumption on contrast sensitivity for stationary and moving gratings. 1994

J T Andre, and R A Tyrrell, and H W Leibowitz, and M E Nicholson, and M Wang
Department of Psychology, Pennsylvania State University, University Park 16802-3106.

Contrast sensitivity was measured for 12 healthy young males while sober, after ingestion of an alcohol placebo, and after ingestion of alcohol (95% grain alcohol; mean estimated blood alcohol level = .088%). Observations were made for both stationary gratings and gratings that traveled through a circular path and required pursuit eye movements. The significant alcohol-related reduction in contrast sensitivity was 2.6 times greater for moving (.29-log-unit reduction) than for stationary gratings (.11-log-unit reduction). The loss in contrast sensitivity for the moving gratings of high spatial frequency (12 cpd) was particularly severe (.37 log unit). Estimated blood alcohol level was correlated with the loss in contrast sensitivity for moving gratings (r = .61), but not with the loss for stationary gratings. Estimated blood alcohol level was strongly correlated with the difference between the loss in contrast sensitivity to moving and stationary gratings (r = .75). These results are consistent with reports that alcohol consumption degrades the ability to make pursuit eye movements. Subjects' perceived intoxication level was not a reliable predictor of any index of visual performance.

UI MeSH Term Description Entries
D008297 Male Males
D009039 Motion Perception The real or apparent movement of objects through the visual field. Movement Perception,Perception, Motion,Perception, Movement
D010919 Placebos Any dummy medication or treatment. Although placebos originally were medicinal preparations having no specific pharmacological activity against a targeted condition, the concept has been extended to include treatments or procedures, especially those administered to control groups in clinical trials in order to provide baseline measurements for the experimental protocol. Sham Treatment
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000428 Alcohol Drinking Behaviors associated with the ingesting of ALCOHOLIC BEVERAGES, including social drinking. Alcohol Consumption,Alcohol Intake,Drinking, Alcohol,Alcohol Drinking Habits,Alcohol Drinking Habit,Alcohol Intakes,Consumption, Alcohol,Drinking Habit, Alcohol,Habit, Alcohol Drinking,Habits, Alcohol Drinking,Intake, Alcohol
D014796 Visual Perception The selecting and organizing of visual stimuli based on the individual's past experience. Visual Processing,Perception, Visual,Processing, Visual
D015350 Contrast Sensitivity The ability to detect sharp boundaries (stimuli) and to detect slight changes in luminance at regions without distinct contours. Psychophysical measurements of this visual function are used to evaluate VISUAL ACUITY and to detect eye disease. Visual Contrast Sensitivity,Sensitivity, Contrast,Sensitivity, Visual Contrast

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