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      Blockage of Induced Pseudopregnancy by Electrochemical Stimulation of the Limbic System

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          Abstract

          Pseudopregnancy induced by cervical stimulation was inhibited by acute electrochemical stimulation of the corticomedial amygdala or dorsal hippocampus under sodium pentobarbital anesthesia (40 mg/kg) in adult, cyclic female Sprague-Dawley rats. The degree to which pseudopregnancy was blocked depended on temporal conditions of brain stimulation and sodium pentobarbital administration. Pentobarbital alone had a suppressing effect on the incidence of pseudopregnancy, especially when it preceded cervical stimulation. Limbic stimulation before cervical stimulation had a tendency to potentiate the suppression of pseudopregnancy by pentobarbital. After cervical stimulation, hippocampal stimulation tended to inhibit the development of pseudopregnancy, potentiating the pentobarbital suppression, while amygdala stimulation tended to override the pentobarbital blockage of pseudopregnancy. These findings suggest a negative influence of these two limbic structures and pentobarbital on the secretion of prolactin.

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          Author and article information

          Journal
          HRE
          Horm Res Paediatr
          10.1159/issn.1663-2818
          Hormone Research in Paediatrics
          S. Karger AG
          1663-2818
          1663-2826
          1975
          1975
          21 November 2008
          : 6
          : 1
          : 47-56
          Affiliations
          Department of Physiology, Wayne State University School of Medicine, Detroit, Mich.
          Article
          178661 Horm Res 1975;6:47–56
          10.1159/000178661
          1171816
          © 1975 S. Karger AG, Basel

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          Page count
          Pages: 10
          Categories
          Original Paper

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