Interganglionic cerebral-buccal mechanoafferents of Aplysia: receptive fields and synaptic connections to different classes of neurons involved in feeding behavior.
Interganglionic cerebral-buccal mechanoafferents of Aplysia: receptive fields and synaptic connections to different classes of neurons involved in feeding behavior.
复制标题
海兔的节间脑颊机械传入：感受野和与参与进食行为的不同类别神经元的突触连接。
DOI：
10.1152/jn.1982.48.1.271
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发表时间：
1982
影响因子：
2.5
通讯作者：
Kupfermann,I
中科院分区：
文献类型：
--
作者：
Rosen,SC;Weiss,KR;Cohen,JL;Kupfermann,I
6. 在B4和B5中，ICBM单次脉冲激发的复合EPSP相对较大（平均10.8 mV），并且总是诱发突触后脉冲，偶尔也会诱发一系列脉冲。以4个脉冲刺激ICBM神经元，可诱发B4和B5的epsp累加，并可大大延长刺激的持续时间。叠加的epsp超过峰值阈值，经常引起加速峰值爆发。同时来自颊神经2的细胞外记录表明，至少有6至8个神经元的颊输出模式伴随着B4和B5的爆发活动。7. 60%的洲际弹道导弹被发现与同侧脑脑细胞（MCC）单突触偶联。因此，同一感觉神经元的分支既向“状态”或调节系统的神经元提供输入，也向特定的运动神经元（b细胞、B4和B5）提供输入。MCC的单一EPSP振幅一般小于0.5 mV，很少足以引起MCC尖峰。然而，口腔周围区的机械刺激被发现唤起复合epsp和持续的去极化，能够诱导重复的MCC尖峰。
6. The compound EPSP evoked in B4 and B5 by firing of a single spike of an ICBM was relatively large (mean, 10.8 mV) and invariably evoked a postsynaptic spike or, occasionally, a train of spikes. Stimulation of ICBM neurons in bursts of 4 spikes evoked summating EPSPs in B4 and B5, which could greatly outlast the period of stimulation. The summating EPSPs exceeded spike threshold and frequently gave rise to an accelerating spike burst. Simultaneous extracellular recordings from buccal nerve 2 indicated that a pattern of buccal output involving at least six to eight neurons accompanied bursting activity in B4 and B5. 7. Sixty percent of ICBMs tested were found to be monosynaptically coupled to the ipsilateral metacerebral cell (MCC). Thus, collaterals of the same sensory neuron provide inputs both to neurons of a “state” or modultory system as well as to specific motor neurons (B-cells and B4 and B5). The unitary EPSP amplitudes in the MCC were generally less than 0.5 mV and were rarely sufficient to elicit a MCC spike. However, mechanical stimulation of the perioral zone was found to evoke compound EPSPs and sustained depolarizations capable of inducing repetitive MCC spiking.