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      Multiple Unit Activity Patterns of Neuronal Populations in Gonadotropic Areas of the Quail Hypothalamus: Spontaneous and Photically-Induced Firing

      ,

      Neuroendocrinology

      S. Karger AG

      Gonadotropic control, Hypothalamus, Multiple unit activity, Quail

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          Abstract

          Multiple-unit activity (MUA) was obtained from neuronal pools in the gonadotropic hypothalamus of quails. A special device allowed for exploration of various hypothalamic structures in unanesthetized birds. All recording sessions were made in the dark. Spontaneous and flash light-evoked MUAs were recorded from both tuberal and dorsal gonadotropic areas, either in the morning or in the afternoon, and were compared to extragonadotropic firing patterns. Firing rates (spikes/10 sec) and integrated MUA (200 addresses) provided distinctive spontaneous neuronal activities for various cell clusters. These spontaneous salient features appeared to be changeable throughout the photoperiod. Flash stimulations resulted in a marked increase in MUA recorded from the gonadotropic regions of the hypothalamus.

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          Author and article information

          Journal
          NEN
          Neuroendocrinology
          10.1159/issn.0028-3835
          Neuroendocrinology
          S. Karger AG
          0028-3835
          1423-0194
          1975
          1975
          20 March 2008
          : 17
          : 2
          : 175-188
          Affiliations
          Laboratoire de Physiologie Générate 1, Université de Montpellier II, Montpellier
          Article
          122353 Neuroendocrinology 1975;17:175–188
          10.1159/000122353
          1134622
          © 1975 S. Karger AG, Basel

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          Page count
          Pages: 14
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          Paper

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