Wang D, Maler L
Department of Anatomy and Neurobiology, Faculty of Medicine, University of Ottawa, Ont., Canada.
Brain Res. 1994 Aug 8;653(1-2):215-22. doi: 10.1016/0006-8993(94)90392-1.
The first processing station of the electrosensory system is the medullary electrosensory lateral line lobe. The electrosensory lateral line lobe of gymnotiform fish is a laminated structure with three anatomically distinct excitatory inputs: primary afferents from electroreceptors, the direct feedback from n. praeminentialis and indirect feedback from n. praeminentialis via a cerebellar lobe--the eminentia granularis posterior. We utilized immunocytochemistry on L-R White-embedded semithin sections, and immunogold on thin sections to localize glutamate and aspartate in the electrosensory lateral line lobe, its afferent inputs and efferent targets. The excitatory inputs and the electrosensory lateral line lobe projection neurons are immunopositive for glutamate only, suggesting that glutamate rather than aspartate is the excitatory transmitter of the electrosensory system.
电感应系统的第一个处理站是延髓电感应侧线叶。裸背电鳗类鱼的电感应侧线叶是一种分层结构，具有三种在解剖学上不同的兴奋性输入：来自电感受器的初级传入神经、前主神经的直接反馈以及前主神经通过一个小脑叶——颗粒突出后部的间接反馈。我们利用对L-R白色包埋半薄切片进行免疫细胞化学，以及对超薄切片进行免疫金标法，来定位电感应侧线叶、其传入输入和传出靶点中的谷氨酸和天冬氨酸。兴奋性输入和电感应侧线叶投射神经元仅对谷氨酸呈免疫阳性，这表明谷氨酸而非天冬氨酸是电感应系统的兴奋性递质。
