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Neural Activation by Milnacipran and Memory Extinction
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作者 Hisahito Ishida Masaaki Iwata +1 位作者 yukihiko shirayama Katsumasa Muneoka 《Journal of Behavioral and Brain Science》 2012年第2期141-145,共5页
Background: Among neurotransmitter influencing memory formation, the noradrenergic system has been recognized as an important system. Memory formation involves various regions including the prefrontal cortex, hippocam... Background: Among neurotransmitter influencing memory formation, the noradrenergic system has been recognized as an important system. Memory formation involves various regions including the prefrontal cortex, hippocampus, amygdala and septum. Method: We investigated the effects of milnacipran on passive avoidance task and evaluated Fos counting in the prefrontal cortex, hippocampus, septum, amygdala and nucleus accumbens. Results: The milnacipran-treated rats (20 mg/kg, 4 days) showed a significant decrease in the number of Fos-immunoreactive cells in the infralimbic portion of prefrontal cortex, the shell portion of nucleus accumbens and the CA1 region of hippocampus, but a significant increase in the Fos counts in the lateral septum with no changes in the Fos counts in the striatum and amygdala. The milnacipran-treated rats showed amelioration in memory extinction (although not statistically significant), but not in memory acquisition and consolidation in the passive avoidance test. Conclusion: The differential activation of the brain regions might be possible sites for ameliorating memory extinction as well as antidepressant effects. 展开更多
关键词 MILNACIPRAN Passive AVOIDANCE Task PREFRONTAL Cortex Nucleus ACCUMBENS Hippocampus SEPTUM
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Rate of social anxiety disorder, its comorbidity with depression and paroxetine effects in outpatients in Japan
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作者 yukihiko shirayama Michio Takahashi +2 位作者 Masatoshi Suzuki Atsushi Kimura Koichi Sato 《Open Journal of Psychiatry》 2013年第1期191-194,共4页
The prevalence of persons with social anxiety disorder (SAD) in Japan remains unknown. This study examined 293 patients with age between 20 and 60 at first visit on the outpatient clinic of psychiatry by the section o... The prevalence of persons with social anxiety disorder (SAD) in Japan remains unknown. This study examined 293 patients with age between 20 and 60 at first visit on the outpatient clinic of psychiatry by the section of social phobia of M.I.N.I. and DSM-IV. After that, 10 patients with both SAD out of 16 patients (trial recruited) completed 12 weeks of treatment with paroxetine. Among 63 patients with 4 points and 40 patients with 3 points on the M.I.N.I., 21 patients (33%) and 16 patients (40%) were diagnosed as SAD on DSM-IV criteria, respectively. Together, 37 patients (12.6%) were diagnosed as SAD out of the 293 outpatients. Among 37 patients with SAD, 23 patients (62%) had comorbid depression. As for 10 patients after treatment with paroxetine, 8 patients improved from the point of recovery of depression (HAM-D scores below 10), whereas only 4 patients improved from the point of recovery of social phobia (L-SAS scores below 30). Three points as well as 4 points on the M.I.N.I. is meaningful for the diagnosis of SAD. For a while, paroxetine exerted less beneficial effects on SAD rather than on depression. 展开更多
关键词 Social ANXIETY DISORDER DEPRESSION PAROXETINE COMORBIDITY
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