No abstract available
MeSH terms
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Analgesics*
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Animals
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Electroshock
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Endorphins / pharmacology*
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Enkephalins / analysis
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Enkephalins / pharmacology*
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Haplorhini
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Male
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Morphine / pharmacology
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Rats
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Reaction Time / drug effects
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Receptors, Opioid / metabolism
Substances
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Analgesics
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Endorphins
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Enkephalins
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Receptors, Opioid
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Morphine