Marui T, Caprio J
Brain Res. 1982 Jan 7;231(1):185-90. doi: 10.1016/0006-8993(82)90017-8.
Neural responses in the facial lobe of th channel catfish to chemical and mechanical stimulation of the external skin surface were studied electrophysiologically. Taste and tactile neurons in the lobe were organized in a somatotopic manner, which confirms the anatomical reports of the facial lobe in the bullhead catfish, but is markedly different from that of the Cyprinidae. The taste neurons were arranged generally in the more dorsal regions of the tactile sensitive areas and responded with highest frequency to L-alanine or L-arginine HCI among several amino acids tested. The mechanically responsive neurons in the deeper layer of the antero-medial portion of the lobe, possibly corresponding to the intermediate nucleus of the facial lobe, had large receptive fields ranging from 100 mm to the whole body surface; in addition, some of these neurons showed lateral inhibition. The present study revealed that the facial lobe of the channel catfish is a center not only for gustatory input, but also for tactile information.
用电生理学方法研究了沟鲶面部叶对外部皮肤表面化学和机械刺激的神经反应。该叶中的味觉和触觉神经元以躯体定位的方式排列，这证实了牛头鲶面部叶的解剖学报告，但与鲤科鱼类明显不同。味觉神经元通常排列在触觉敏感区域的更靠背部区域，在几种测试氨基酸中，对L-丙氨酸或L-精氨酸盐酸盐反应频率最高。叶的前内侧部分较深层中的机械反应神经元，可能对应于面部叶的中间核，具有从100毫米到整个体表的大感受野；此外，其中一些神经元表现出侧向抑制。本研究表明，沟鲶的面部叶不仅是味觉输入的中心，也是触觉信息的中心。
