Abstract
The departure of activity level from a nondeprived basal level was measured in rats deprived of food for 0, 24, 48, and 72 hours. Activity indices of varying sensitivity were secured. On the c ntact stabilimeter, sensitive to small movements, hungry rats were significantly less active than controls or their own predeprivation base. There were no significant differences with coarser measures. Females were more active than males. "It was concluded that hunger primarily increases activity of a gross locomotor nature and decreases fine, essentially nonlocomotor activity.".

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