No abstract available
MeSH terms
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Acetylcholine / pharmacology*
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Aging*
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Animals
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Cell Death
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Enkephalin, Methionine / pharmacology*
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Hippocampus / cytology*
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Humans
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Memory
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Pyramidal Cells / cytology
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Pyramidal Cells / drug effects*
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Pyramidal Cells / physiology
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Rats
Substances
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Enkephalin, Methionine
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Acetylcholine