FMRFamide-like immunoreactivity in the brain of the Pacific hagfish,Eptatretus stouti (Myxinoidea) |
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Authors: | Helmut Wicht R Glenn Northcutt |
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Institution: | (1) Zentrum der Morphologie, Abteilung Neurobiologie, Klinikum der Johann Wolfgang Goethe-Universität, Theodor-Stern-Kai 7, V-6000 Frankfurt/Main 70, Federal Republic of Germany;(2) Neurobiology Unit, Scripps Institution of Oceanography and Department of Neurosciences, School of Medicne, University of California, 92093 San Diego, La Jolla, CA, USA |
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Abstract: | Summary The distribution of FMRFamide-like immunoreactivity was investigated in the brain of a myxinoid, the Pacific hagfish,Eptatretus stouti, by means of immunocytochemistry. In the forebrain, labelled cell bodies occurred in the infundibular nucleus of the hypothalamus and some closely adjacent nuclei. Labelled fibers formed a diffuse network in the forebrain, but there was no evidence for the presence of intracerebral ganglionic cells of the terminal nerve or a central projection of the terminal nerve. In the hindbrain, a group of labelled cells was found in the trigeminal sensory nucleus. A distinet terminal arborization occurred in the ventrally adjacent nucleus A of Kusunoki and around the nuclei of the branchial motor column. These findings suggest that FMRFamide may play a role in the central control of branchiomotor activity. |
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Keywords: | FMRFamide Hypothalamus Brain stem Sensomotor system Eptatretus stouti (Agnatha Cyclostomata Myxinoidea) |
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