Journal
CELLULAR AND MOLECULAR LIFE SCIENCES
Volume 63, Issue 14, Pages 1597-1613Publisher
SPRINGER BASEL AG
DOI: 10.1007/s00018-006-6027-5
Keywords
cannabinoid; dopamine; amygdala; cortex; addiction; schizophrenia; ventral tegmental area; emotional processing; associative learning
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Cannabinoids represent one of the most widely used hallucinogenic drugs and induce profound alterations in sensory perception and emotional processing. Similarly, the dopamine (DA) neurotransmitter system is critical for the central processing of emotion and motivation. Functional disturbances in either of these neurotransmitter systems are well-established correlates of the psychopathological symptoms and behavioral manifestations observed in addiction and schizophrenia. Increasing evidence from the anatomical, pharmacological and behavioral neuroscience fields points to complex functional interactions between these receptor systems at the anatomical, pharmacological and neural systems levels. An important question relates to whether these systems act in an orchestrated manner to produce the emotional processing and sensory perception deficits underlying addiction and schizophrenia. This review describes evidence for functional neural interactions between cannabinoid and DA receptor systems and how disturbances in this neural circuitry may underlie the aberrant emotional learning and processing observed in disorders such as addiction and schizophrenia.
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