Motoneurons innervating the cremaster muscle of the rat are characteristically densely innervated by serotoninergic fibers as revealed by combined immunohistochemistry and retrograde fluorescence DAPI-labelling
- 1 October 1983
- journal article
- research article
- Published by Springer Nature in Brain Structure and Function
- Vol. 168 (1) , 41-49
- https://doi.org/10.1007/bf00305397
Abstract
The lumbar spinal cord of the rat was studied by combined retrograde fluorescent labelling with 4′,6-diamidino-2-phenylindole-2HCl (DAPI) and immunoperoxidase procedure using serotonin antiserum. A peculiar small neuronal group endowed more densely than other anterior horn neurons with serotonin-like immunoreactive fibers was recognized in the anterior column of lumbar segments L1–L2. At the same time, this small nucleus was shown to contain the motoneurons innervating the cremaster muscle by means of retrograde labelling with DAPI. It is tentatively suggested that the bulbospinal descending serotonin system is particularly intimately connected with the function of the cremaster muscle.Keywords
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