No abstract available
Publication types
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Controlled Clinical Trial
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Letter
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Research Support, N.I.H., Extramural
MeSH terms
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Analgesics, Opioid / pharmacology
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Beauty*
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Cross-Over Studies
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Double-Blind Method
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Face
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Humans
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Male
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Morphine / pharmacology
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Motivation / drug effects
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Motivation / physiology*
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Naltrexone / pharmacology
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Narcotic Antagonists / pharmacology
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Photic Stimulation
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Receptors, Opioid, mu / agonists
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Receptors, Opioid, mu / antagonists & inhibitors
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Receptors, Opioid, mu / physiology*
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Reward*
Substances
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Analgesics, Opioid
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Narcotic Antagonists
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Receptors, Opioid, mu
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Naltrexone
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Morphine