Endorphins and Behavior

INTRODUCTION 87 A NALGESIC EFFECTS 89 The Experimental Paradigm 89 Testing Analgesia 89 Tail .flick . . .. ... 89 Hot plate 90 Chemically induced pain 90 TRIGGERING THE ENDORPHINS 91 Shock-Induced Analgesia 91 Fear-Induced Analgesia .... .. 92 Unsettled Problems . 93 OTHER BEHAVIORAL EFFECTS 94 Effects on Fear-Motivated Behavior .. 94 Memory Effects 95 Hedonic Effects 96 Metabolic Effects 96 Efficts and Functions 97