Activity anorexia: Biological, behavioral, and neural levels of selection

Behavioral and Brain Sciences 24 (3):551-552 (2001)
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Activity anorexia illustrates selection of behavior at the biological, behavioral, and neural levels. Based on evolutionary history, food depletion increases the reinforcement value of physical activity that, in turn, decreases the reinforcement effectiveness of eating – resulting in activity anorexia. Neural opiates participate in the selection of physical activity during periods of food depletion.



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