Long-term stress-induced analgesia and activation of the opiate system.
D000698:Analgesia; D000818:Animals; D004597:Electroshock; D004723:Endorphins / Q000037:antagonists & inhibitors / Q000502:physiology*; D009271:Naltrexone / Q000494:pharmacology; D010146:Pain / Q000503:physiopathology*; D051381:Rats; D013312:Stress, Physiological / Q000503:physiopathology*; D013623:Tail; D013997:Time Factors
D004723:Endorphins; D009271:Naltrexone