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• W2090419097 abstract "We have recently demonstrated that systemic administration of 5-HT(2C) and 5-HT(2A) receptor antagonists significantly enhanced and impaired spatial reversal learning, respectively. In this study, the role of 5-HT(2C) and 5-HT(2A) receptor subtypes in the mediation of these opposing effects was further investigated with respect to neuroanatomical specificity. The roles of 5-HT(2C) and 5-HT(2A) receptors were examined within some of the brain regions implicated in cognitive flexibility, namely the orbitofrontal cortex (OFC), medial prefrontal cortex (mPFC), and nucleus accumbens (NAc), by means of targeted infusions of selective 5-HT(2C) and 5-HT(2A) receptor antagonists (SB 242084 and M100907, respectively). Intra-OFC 5-HT(2C) receptor antagonism produced dose-dependent effects similar to those of systemic administration, i.e., improved spatial reversal learning by reducing the number of trials (all doses: 0.1, 0.3, and 1.0 microg) and perseverative errors to criterion (0.3 and 1.0 microg) compared with controls. However, the highest dose (1.0 microg) showed a nonselective effect, as it also affected retention preceding the reversal phase and decreased learning errors. Intracerebral infusions of SB 242084 into the mPFC or NAc produced no significant effects on any behavioral measures. Similarly, no significant differences were observed with intra-OFC, -mPFC, or -NAc infusions of M100907. These data suggest that the improved performance in reversal learning observed after 5-HT(2C) receptor antagonism is mediated within the OFC. These data also bear on the issue of whether 5-HT(2C) receptor antagonism within the OFC might help elucidate the biological substrate of obsessive-compulsive disorder, offering the potential for therapeutic application." @default.
• W2090419097 created "2016-06-24" @default.
• W2090419097 creator A5020886846 @default.
• W2090419097 creator A5043868677 @default.
• W2090419097 date "2010-01-20" @default.
• W2090419097 modified "2023-09-30" @default.
• W2090419097 title "Enhancement of Spatial Reversal Learning by 5-HT_2CReceptor Antagonism Is Neuroanatomically Specific" @default.
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• W2090419097 doi "https://doi.org/10.1523/jneurosci.4312-09.2010" @default.
• W2090419097 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6633094" @default.
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