Abstract:
:Visual cues that become associated with the consumption of psychostimulant drugs energize craving and the intake of the drug by mechanisms of which little is known. In two experiments using in vivo microdialysis in freely moving rats we compared the effects of visual and auditory stimulation with that of cocaine (0, 5, 10, 20mg/kg; i.p.) on the extracellular serotonin (5-HT) activity in the occipital and temporal cortices in relation to behavior. Visual stimulation increased 5-HT in the occipital, but not temporal cortex, parallel to an increase in locomotion. Auditory stimulation decreased 5-HT in the auditory, but not occipital cortex, thus, showing a double dissociated 5-HT response. These data suggest that a locally restricted 5-HT response to sensory stimulation may gate behavioral activity sense-modality selectively. Cocaine affected 5-HT in the occipital cortex and behavioral activity in the same direction as visual stimulation, but in an amplified and prolonged way. In the temporal cortex cocaine also caused an increase in 5-HT. The findings demonstrate common effects of visual stimulation and cocaine on 5-HT activity in the occipital cortex in relation to locomotor activity. The results suggest that concepts of how neutral visual cues become powerful energizers of addiction-related behaviors should be expanded to incorporate not only an acute enhancement of reward processing mechanisms, but, in parallel, also an amplified processing of visual stimuli in the occipital cortex.
journal_name
Neuropharmacologyjournal_title
Neuropharmacologyauthors
Müller CP,De Souza Silva MA,Huston JPdoi
10.1016/j.neuropharm.2006.10.002subject
Has Abstractpub_date
2007-03-01 00:00:00pages
854-62issue
3eissn
0028-3908issn
1873-7064pii
S0028-3908(06)00357-1journal_volume
52pub_type
杂志文章abstract::Some phytochemical-derived synthetic compounds have been shown to improve neurological disorders, especially in ischemic stroke. In this study, we identified a novel biscoumarin compound, known as COM 3, which had substantial antioxidant effects in neurons. Next, we found that COM 3 occupies a critical binding site be...
journal_title:Neuropharmacology
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journal_title:Neuropharmacology
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journal_title:Neuropharmacology
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更新日期:2007-06-01 00:00:00
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doi:10.1016/j.neuropharm.2004.12.006
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pub_type: 杂志文章
doi:10.1016/s0028-3908(03)00041-8
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journal_title:Neuropharmacology
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journal_title:Neuropharmacology
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journal_title:Neuropharmacology
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更新日期:2011-03-01 00:00:00
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journal_title:Neuropharmacology
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journal_title:Neuropharmacology
pub_type: 杂志文章
doi:10.1016/0028-3908(91)90131-t
更新日期:1991-10-01 00:00:00
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journal_title:Neuropharmacology
pub_type: 杂志文章
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journal_title:Neuropharmacology
pub_type: 杂志文章
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更新日期:1996-01-01 00:00:00
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journal_title:Neuropharmacology
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journal_title:Neuropharmacology
pub_type: 杂志文章
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journal_title:Neuropharmacology
pub_type: 历史文章,杂志文章,评审
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更新日期:2008-11-01 00:00:00
abstract::Efficient transcytosis across the blood-brain-barrier (BBB) is an important strategy for accessing drug targets within the central nervous system (CNS). Despite extensive research the number of studies reporting successful delivery of macromolecules or macromolecular complexes to the CNS has remained very low. In orde...
journal_title:Neuropharmacology
pub_type: 杂志文章,评审
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更新日期:2017-07-01 00:00:00