Effect of a low-carbohydrate diet and alcohol on perceptual motor skill.

Eleven adults of both sexes ate a low-carbohydrate diet consisting mainly of meat, fish, and eggs for two days. After a low-carbohydrate breakfast on the third day, they operated a Stressalyzer to test their basic perceptual motor skill. Each subject drank 1.5 oz. rye whiskey at hourly intervals from 9:30 A.M. to 12:30 P.M. Blood glucose decreased to below 50 mg. per 100 ml. in three of the eleven subjects; two of the three had decreased perceptual motor skill.