Patterns of serotonin-immunoreactive neurons in the central nervous system of the earthworm Lumbricus terrestris L. |
| |
Authors: | Ulrike Spörhase-Eichmann Heribert Gras Friedrich-Wilhelm Schürmann |
| |
Institution: | (1) I. Zoologisches Institut der Universität, Abteilung für Zellbiologie, Universität Göttingen, Federal Republic of Germany;(2) Abt. f. Zellbiologie, Universität Göttingen, Berliner Str. 28, D-3400 Göttingen, Federal Republic of Germany |
| |
Abstract: | Summary The distribution patterns of serotonin-immunoreactive somata in the cerebral and subpharyngeal ganglion, and in the head and tail ganglia of the nerve cord of Lumbricus terrestris are described from whole-mount preparations. A small number of serotonin-immunoreactive neurons occurs in the cerebral ganglion, in contrast to the large population of serotonin-immunoreactive neurons that exists in all parts of the ventral nerve cord. From the arrangement of serotonin-immunoreactive somata in the subpharyngeal ganglion, we suggest that this ganglion arises from the fusion of two primordial ganglia. In head and tail ganglia, the distribution of serotonin-immunoreactive somata resembles that in midbody segments. Segmental variations in the pattern and number of serotonin-immunoreactive somata in the different body regions are discussed on the background of known developmental mechanisms that result in metameric neuronal populations in annelids and arthropods.Abbreviations
CG1, CG2
cerebral soma group 1, 2
-
CNS
central nervous system
-
GINs
giant interneurons
-
5-HT
5-hydroxytryptamine, serotonin
-
5-HTi
5-HT-immunoreactive
-
N
side nerve
-
SG19
subpharyngeal soma group 1–9
-
SN
segmental nerve |
| |
Keywords: | Serotonin Immunocytochemistry Central nervous system Annelids Lumbricus terrestris |
本文献已被 SpringerLink 等数据库收录! |
|