Wullimann M F, Northcutt R G
Neurobiology Unit, Scripps Institution of Oceanography, University of California San Diego, La Jolla 92093.
J Comp Neurol. 1989 Nov 22;289(4):554-67. doi: 10.1002/cne.902890403.
The afferent connections of the valvula cerebelli were examined in one cypriniform teleost (Carassius auratus) and one perciform teleost (Lepomis cyanellus) with the use of horseradish peroxidase as a retrograde tracer. Both species have ipsilateral input to the valvula from the central pretectal and dorsal accessory optic nuclei, the dorsal and ventral tegmental nuclei, the lateral nucleus of the valvula, the perilemniscal nucleus, and nucleus isthmi and contralateral input from the inferior olivary nucleus. In addition, Carassius has ipsilateral valvulopetal projections from the eminentia granularis, the prae-eminential nucleus, and the isthmic primary sensory trigeminal nucleus, whereas Lepomis has bilateral (stronger ipsilaterally) valvulopetal projections from the nucleus of the locus coeruleus and the rostral corpus cerebelli. The topographical order of the cerebellopetal projections of the lateral nucleus of the valvula and inferior olive is also described, as are differential inputs to various subdivisions of the cerebellum in the two species. Information on valvulopetal projections in teleosts has thus far been limited to electroreceptive mormyrids. The present study shows that many valvular inputs related to electroreception in mormyrids have no homologue in Carassius and Lepomis. Finally, the present study indicates that the rostral part of the corpus cerebelli, but not the valvula cerebelli, in teleosts is the homologue of the anterior lobe of the corpus cerebelli in cartilaginous fishes. Thus, the valvula cerebelli is a shared derived feature (synapomorphy) of all ray-finned fishes.
利用辣根过氧化物酶作为逆行示踪剂，在一种鲤形目硬骨鱼（鲫鱼）和一种鲈形目硬骨鱼（蓝鳃太阳鱼）中研究了小脑瓣的传入连接。两种鱼都有来自中脑顶盖前区和背侧副视核、背侧和腹侧被盖核、小脑瓣外侧核、缘膜周核以及峡核的同侧输入到小脑瓣，以及来自下橄榄核的对侧输入。此外，鲫鱼有来自颗粒隆起、前颗粒隆起核和峡部原发性感觉三叉神经核的同侧小脑瓣投射，而蓝鳃太阳鱼有来自蓝斑核和小脑体吻侧部的双侧（同侧更强）小脑瓣投射。还描述了小脑瓣外侧核和下橄榄核的小脑传入投射的拓扑顺序，以及两种鱼中小脑不同亚区的差异输入。迄今为止，硬骨鱼中小脑瓣投射的信息仅限于具有电感受性的长颌鱼目鱼类。本研究表明，长颌鱼目中许多与电感受相关的小脑瓣输入在鲫鱼和蓝鳃太阳鱼中没有同源物。最后，本研究表明，硬骨鱼中小脑体的吻侧部分而非小脑瓣是软骨鱼类小脑体前叶的同源物。因此，小脑瓣是所有辐鳍鱼类共有的衍生特征（共同衍征）。
