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ISSN 0185-3325 (Print)
Órgano Oficial del Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz

2000, Number 3

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Salud Mental 2000; 23 (3)

Neurobiology of addiction neuroanatomical, neurochemical, molecular and genetic aspects of morphine and cocaine addiction PART I

Leff P, Medina-Mora ME, Calva JC, Valdés A, Acevedo R, Morales A, Medécigo M, Antón B

Language: Spanish
References: 45
Page: 46-51
PDF size: 119.98 Kb.


ABSTRACT

Addiction is a serious clinical and social problem that impacts public health organizations in many countries. From a medical viewpoint, addiction is a complex neurobiological phenomenon that affects different functional and molecular processes in specific areas of the mammal brain including human. Animal models of addiction have extensively used pharmacological paradigms of drug self administration with the aim of investigating the addictive properties of psychotropic substances such as morphine, heroine and cocaine. Thus, studies on these animal models have identified that addictive properties of these substances depend upon their pharmacological actions for altering the specific neural functions of the mesocorticolimbic dopaminergic circuitry. Specific electrophysiological, neurochemical and genomic alterations in the mesocorticolimbic dopaminergic pathway have been identified during the development and long-term consolidation of complex behavioral states related to drug dependence and reward. This work reviews the current information related to the major electrophysiological and neurochemical alterations that have been observed in the dopaminergic mesocorticolimbic circuitry during the addictive processes of morphine, heroin and cocaine.


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