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    Article

    Different effects of chronic nicotine treatment regimens on body weight and tolerance in the rat

    The effect of different chronic nicotine administration regimens on body weight and the development of tolerance was examined in female rats. Groups of animals were either treated with nicotine via a subcutane...

    Michael M. Morgan, Gaylord Ellison in Psychopharmacology (1987)

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    Differences in Antinociception Evoked from Dorsal and Ventral Regions of the Caudal Periaqueductal Gray Matter

    Stimulation-produced antinociception (SPA) from the periaqueductal gray matter (PAG) was first reported by Reynolds in 1969. Mayer and co-workers (1971) further characterized this phenomenon, demonstrating tha...

    Michael M. Morgan in The Midbrain Periaqueductal Gray Matter (1991)

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    Article

    Factors That Influence Willingness to Help the Homeless

    Homelessness is an ongoing challenge for many families and individuals. Many struggle to meet their basic needs for food, clothing and shelter. Unfortunately, we know very little about the people...

    Michael M. Morgan, H. Wallace Goddard… in Journal of Social Distress and the Homeless (1997)

  4. Article

    Behavioral and Electrophysiological Evidence for Opioid Tolerance in Adolescent Rats

    Morphine and other opiates are successful treatments for pain, but their usefulness is limited by the development of tolerance. Given that recent studies have observed differential sensitivity to drugs of abus...

    Susan L Ingram, Erin N Fossum, Michael M Morgan in Neuropsychopharmacology (2007)

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  5. Article

    Tolerance to Repeated Morphine Administration Is Associated with Increased Potency of Opioid Agonists

    Tolerance to the pain-relieving effects of opiates limits their clinical use. Although morphine tolerance is associated with desensitization of μ-opioid receptors, the underlying cellular mechanisms are not under...

    Susan L Ingram, Tara A Macey, Erin N Fossum, Michael M Morgan in Neuropsychopharmacology (2008)

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    Contribution of dopamine receptors to periaqueductal gray-mediated antinociception

    Morphine relieves pain, in part, by acting on neurons within the periaqueductal gray (PAG). Given that the PAG contains a subpopulation of dopamine neurons, dopamine may contribute to the antinociceptive effec...

    Paul J. Meyer, Michael M. Morgan, Laura B. Kozell, Susan L. Ingram in Psychopharmacology (2009)

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    Reference Work Entry At a glance

    Internalization

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    Opioid

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    GPCR

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    μ-Receptor

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    σ-Receptor

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Voltage-Gated Potassium Channels

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Downregulation

    Michael M Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    Antinociception

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    Delta-Receptor

    Michael M Morgan, M J Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    Enkephalinase

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Reference Work Entry At a glance

    Endogenous Opioid

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    G-Protein-Coupled Inwardly Rectifying Potassium Channels

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Hetero-Oligomers

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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    Kappa-Receptor

    Michael M. Morgan, MacDonald J. Christie in Encyclopedia of Psychopharmacology (2010)

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