Ascending gustatory pathways to the telencephalon in goldfish
Ascending gustatory pathways to the telencephalon in goldfish
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DOI：
10.1002/cne.23049
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发表时间：
2012-08-01
影响因子：
2.5
通讯作者：
Yamamoto, Naoyuki
中科院分区：
文献类型：
--
作者：
Kato, Takeshi;Yamada, Yusuke;Yamamoto, Naoyuki
用神经束示踪法研究了金鱼次级味觉核（SGN）、球前第三味觉核（pTGN）和球前内侧核（PGm）向端脑的上行通路。示踪剂注射到SGN表明存在直接上行途径的supracommissural和背侧部分的腹侧端脑区，和内侧部分的背侧端脑区（Dm），仅限于其腹侧区域。SGN实验还表明，pTGN和PGm的投射，并在初级味觉中心的几种神经元类型的新发现，引起上升纤维的SGN。对pTGN的注射表明该核与Dm背侧区（dDm）存在相互联系。注射PGm导致标记细胞的背侧部分的SGN，次级一般内脏核，和背侧端脑区的后部，这表明，这preglomerular核接收味觉，一般内脏，和嗅觉输入。标记的PGm终止于背侧端脑区和dDM的中央部分，后者的区域包含许多标记的胞体。PGm纤维的终末区位于dDm的横向相邻的pTGN。对pTGN和PGm的注射实验也表明这些核团与下叶核和外侧隆凸有联系。根据目前以及最近的研究结果，提供了一个更新的地图，显示和大不同的感觉代表内的金鱼背侧端脑区。J.Comp.神经元520：24752499，2012。(C)2012 Wiley Periodicals，Inc.
Ascending pathways to the telencephalon from the secondary gustatory nucleus (SGN), preglomerular tertiary gustatory nucleus (pTGN), and medial preglomerular nucleus (PGm) were examined by tract-tracing experiments in goldfish Carassius auratus. Tracer injections to the SGN suggest the presence of direct ascending pathways to the supracommissural and the dorsal parts of the ventral telencephalic area, and the medial part of the dorsal telencephalic area (Dm), restricted to its ventral region. The SGN experiments also suggest projections to the pTGN and PGm, and several neuronal types in the primary gustatory centers were newly found to give rise to ascending fibers to the SGN. Injections to the pTGN suggest reciprocal connections of the nucleus with the dorsal region of the Dm (dDm). Injections to the PGm resulted in labeled cells in the dorsal part of the SGN, the secondary general visceral nucleus, and the posterior part of the dorsal telencephalic area, suggesting that this preglomerular nucleus receives gustatory, general visceral, and olfactory inputs. Fibers labeled from the PGm terminated in the central part of the dorsal telencephalic area and the dDm; the latter region contained many labeled somata. The terminal zone of PGm fibers in the dDm is located laterally adjacent to that from the pTGN. Injection experiments to the pTGN and PGm also suggest connections of these nuclei with the inferior lobar nuclei and torus lateralis. Based on the results of the present as well as recent studies, an updated map is provided that shows by and large distinct sensory representation within the goldfish dorsal telencephalic area. J. Comp. Neurol. 520:24752499, 2012. (C) 2012 Wiley Periodicals, Inc.