Anatomical studies of the primary facial taste center in fish

对不同种类鱼类的初级面部味觉中心（面叶）的一般结构进行了组织学检查。结果表明，面叶的结构有6种类型：单柱型、二小叶型、三小叶型、五小叶型、融合型和层间型。单柱型是由位于第四脑室附近的双侧对称柱组成。该柱的前部、中部和后部分别接受主要来自面神经、舌咽神经和迷走神经的投射。单柱是最原始的，可分化为融合型、多小叶型和板层型，分别见于鲤科鱼类、鲶鱼和山羊鱼。为了绘制面神经的定位图，应用跨神经节追踪技术，对三种鲶鱼（Parasilurus asotus，Plotosus lineatus，Arius felis）的面神经各分支的中枢投射进行了研究。结果表明：面神经的单柱是最原始的，并可分化为融合型、多小叶型和板层型。 ...更多信息 辣根过氧化物酶。鲶属、海鲶属和长鼻鲶属的前额叶分别为2、3 - 4和5小叶型。每个小叶是一个纵向的亚柱，并成为不清楚的后区的FL。神经纤维的跟踪显示，每个小叶，除了侧背小叶接受输入的一个单一的触须。例如，Plotosus的四个大致相等的纵向子列分别来自四个大小相似的触须，第五列代表侧翼。另一方面，长，中，短亚柱的Arius接受预测从长上颌，中侧下颌和短内侧下颌触须，分别。这些结果清楚地表明，在鲶鱼中发现的FL的多个小叶类型与触须的数量和长度有关，并且FL的体视组织在三个物种中基本上是相同的。触须的前后轴在FL中以相同的轴表示，而前后轴在FL中以后-前轴表示。少

General structures of the primary facial taste center (facial lobe) were histologically examined in various species of fish. The results show 6 types of the facial lobe (FL) organization: single column type, two lobule type, three lobule type, five lobule type, fusion type and maminar type. The single column type consists of the bilaterally symmetric column located adjacent to the fourth ventricle. The anterior, intermediate and posterior portions of the column receive projections mainly from the facial, glossopharyngeal and vagal nerves, respectively. The single column is considered to be the most primitive and may differentiate into fusion type, multiple lobule types or lamina typeswhich are found in cyprinid fish, catfish and goatfish, respectively.In order to the somatotopic map, the central projections of various branches of the facial nerve were examined in three species of catfish, Parasilurus asotus, Plotosus lineatus, Arius felis by using technique of transganglionic tracing w … More ith horseradish peroxidase. The Parasilurus, Arius and Plotosus have two, three-four and five lobule type of the FL, respectively. Each lobule is a longitudinal subcolumn and become unclear in the posterior region of the FL. Tracing of nerve fibers shows that each lobule except the laterodorsal lobule receives input of a single barbel. For example, the four roughly equal, Longitudinal subcolumns of the Plotosus have input from four similarly-sized barbels, respectively and a fifth column represents the flank. On the other hand, the long, medium and short subcolumns of the Arius receive projections from the long maxillary, medium lateral mandibular and short medial mandibular barbels, respectively. These results clearly show that the multiple lobule types of the FL found in the catfishes is related to the number and length of the barbels, and that the somatotopic organization of the FL is essentially the same among the three species. The anterior-posterior axis of the barbels is represented in the FL in the same axis, while the anterior-posterior axis is represented in the FL in a posterior-anterior axis. Less