No abstract available
MeSH terms
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Analgesia*
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Animals
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Behavior, Animal / drug effects*
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Brain Mapping
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Cerebral Aqueduct / drug effects*
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Dose-Response Relationship, Drug
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Hot Temperature
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Male
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Mesencephalon / drug effects*
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Microinjections
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Morphine / administration & dosage
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Morphine / pharmacology*
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Motor Activity / drug effects*
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Pain
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Rats
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Reaction Time / drug effects