关键词： 脑活动   混沌动力学   神经生理学  

关键词： 神经生长因子   受体   神经生理学  

摘要： 神经生长因子(Nerve growth factor,NGF)是最早发现的神经营养因子。它能促进胚胎神经嵴感觉神经元和交感神经节以及基底前脑胆碱能神经元的分化、发育和存活。同时它又是纹状体神经上皮前体和视皮质形成体的增殖因子。NGF对其应答细胞的生物效应都是通过NGF与细胞表面的特异性膜受体相互作用而启动的。

关键词： 刺激   迟发后除极   激动   神经生理学  

关键词： 临床神经生理学术会议   华东地区   动态脑电图   脑血管病   脑电地形图   临床应用   诱发电位   脑地形图   科研进展   电生理学  

摘要： 第二届华东地区脑电图及临床神经生理学术会议于1994年12月5日至9日在厦门召开,来自江苏、安徽、福建、浙江、山东、江西、上海及四川、云贵、湖北、山西、河南、河北、北京、陕西、辽宁、黑龙江、广东等十几个省市149名专家、代表参加了会议。会议共收到论文279篇,其中大会发言24篇。会上代表们思想活跃、讨论热烈,交流了学术,增进了友谊,使这次大会获得了圆满成功。 会议分八个专题进行了讲座。

摘要： In this note I intend to underline the computational, methodological and conceptual importance of delay activity experiments in cognitively performing animals. The argument consists of two parts. First, a delineation of the various dimensions affected by these experiments. Second, an outline, in the light of the first part, of several outstanding questions (or predictions) calling for future experimental and theoretical effort.

关键词： 减压反应   A1区   迷走神经   传导   神经生理学  

摘要： 在乌拉坦麻醉、双侧切断颈迷走神经的大鼠，电刺激颈迷走神经中枢端可引起各种血压反应。其减压反应可被酚妥拉明（ｉｖ）衰减，而心得安（ｉｖ）则否。室旁核（ＮＰＶ）内注射普鲁卡因也能衰减该反应。Ａ１区和蓝斑均有纤维投射至ＮＰＶ和延髓头端腹外侧交感兴奋区；将普鲁卡因注入Ａ１区可使减压反应减小，但注入蓝斑则不能，提示Ａ１区通过交感缩血管神经和ＮＰＶ参与迷走传入引起的减压反应，蓝斑不参与此反应。

摘要： 1. Receptor blockers for inhibitory amino acids were applied to part or all of the spinal cord of larval lamprey during brain stem-initiated locomotor activity. Blocking glycinergic inhibition with strychnine applied to the entire spinal cord converted the locomotor pattern from left-right alternation to synchronous left-right bursting. The results suggest that left and right oscillators are connected by relatively strong reciprocal inhibitory( glycinergic) connections in parallel with weaker reciprocal excitatory connections. This possible organization was supported by results from a computer model consisting of left and right oscillators connected by reciprocal inhibition and excitation in parallel. In addition, the results suggest that reciprocal inhibition is not required for left-right rhythmicity but rather is involved primarily with phasing of left-right activity. 2. Locally blocking glycinergic inhibition with strychnine in the rostral spinal cord resulted in synchronous left-right burst activity in that region of the cord as well as in more caudal areas of the cord in which reciprocal inhibition should still be functional. 3. Blocking glycinergic inhibition in the caudal spinal cord converted the pattern in that region of the cord to left-right synchronous activity. The effects in the ascending direction on the burst patterns in more rostral areas of the spinal cord were less than those mentioned above in the descending direction with application of strychnine to the rostral spinal cord. 4. With glycinergic inhibition or GABAergic inhibition blocked in the entire spinal cord, stable longitudinal coupling along the spinal cord persisted. This and the neurophysiology results mentioned above suggest that the main mechanism for longitudinal coupling between locomotor networks in adjacent regions of the spinal cord is ipsilateral excitatory connections and not crossed inhibitory connections. This possible organization was supported by results from a computer mod

关键词： amacrine   direction selectivity   ganglion   neurophysiology   retina   turtle  

摘要： Amacrine and ganglion cells are two large classes of inner retinal neurons of the vertebrate retina. Amacrine cells are a morphologically and neurochemically diverse class of axonless neurons, which are primarily involved in lateral retinal processing. In the inner plexiform layer, they engage in complex, often inhibitory, interactions with bipolar and ganglion cells. Two physiological classes of amacrine cells, transient and sustained types, have been distinguished. Ganglion cells in turtle retina comprise many functional subtypes including ON, OFF and ON‐OFF types. Many ganglion cells in turtle retina display complex receptive field properties, responding to movement, orientation and direction. Neural mechanisms underlying direction selective responses in retinal ganglion cells have come under particular scrutiny and are discussed in detail. Copyright © 1994, Wiley Blackwell. All rights reserved

关键词： Aging   Deglutition   Deglutition disorders   Esophageal   Oral   Pharyngeal  

摘要： The neurophysiology of normal swallowing and its alterations related to age are reviewed. Clinical implications in health and disease are discussed. © 1994 Springer-Verlag New York Inc.