INPUTS AND OUTPUTS OF GIANT NEURON-B1 AND NEURON-B2 IN THE BUCCAL GANGLIA OF HELIX-POMATIA - AN ELECTROPHYSIOLOGICAL AND MORPHOLOGICAL-STUDY
INPUTS AND OUTPUTS OF GIANT NEURON-B1 AND NEURON-B2 IN THE BUCCAL GANGLIA OF HELIX-POMATIA - AN ELECTROPHYSIOLOGICAL AND MORPHOLOGICAL-STUDY
复制标题
DOI：
10.1016/0006-8993(87)90007-2
复制
发表时间：
1987-06-30
期刊：
影响因子：
2.9
通讯作者：
ALTRUP, U
中科院分区：
文献类型：
--
作者：
ALTRUP, U
利用电生理学和形态学技术对耳蜗颊神经节中鉴定出的巨型神经元 B1 和 B2 进行研究，以便为相对简单的神经系统中神经元通讯的研究建立基线。发现神经元 B1 和 B2 的不同突触输入来自颊神经节的神经元并通过颊神经传递。在咽部上皮中，双极周围神经元的纤维可以被染色，其中央纤维可能有助于神经元 B1 和 B2 的突触输入。神经元 B1 和 B2 的树突分别主要位于颊神经节神经毡的前部和外侧部分。神经元 B1 的轴突追踪到食管/胃。神经元的细胞内刺激引起纵向纤维的收缩和食道自发蠕动收缩幅度的增加。神经元 B2 的轴突延伸至两个唾液腺。该轴突侧支显示出多个肿胀，沿着唾液腺上皮细胞的基部。讨论了神经元 B1 和 B2 的功能，它们与其他软体动物颊神经节中的巨型神经元同源。
The identified giant neurons B1 and B2 in the buccal ganglia of Helix pomatia were studied with electrophysiological and morphological techniques in order to establish a baseline for the study of neuronal communication in a relatively simple nervous system. Different synaptic inputs to neurons B1 and B2 were found to come from neurons of the buccal ganglia and to come via buccal nerves. In the epithelium of the pharynx, fibers of bipolar peripheral neurons could be stained, the central fibers of which probably contribute to the synaptic inputs of neurons B1 and B2. The dendrites of neurons B1 and B2 are mainly situated in anterior and lateral parts of the neuropil of the buccal ganglia, respectively. The axon of neuron B1 was traced to the esophagous/stomach. Intracellular stimulation of the neuron induces both a contraction of the longitudinally oriented fibers and an increase in the amplitude of spontaneously occurring peristaltic contractions of the esophagus. The axons of neuron B2 run to both salivary glands. This axon collaterals showing multiple swellings follow the bases of the epithelial cells of the salivary gland. The functioning of neurons B1 and B2, which are homologous to giant neurons in the buccal ganglia of other molluscs, is discussed.