Ezure K, Oshima T
Jpn J Physiol. 1985;35(2):269-90. doi: 10.2170/jjphysiol.35.269.
In the encéphale isolé cat preparation the cerebral peduncle (CP) and the nucleus ventralis lateralis (VL) of the thalamus were stimulated. Short-latency responses recorded from precruciate cortical neurons consisted of excitatory (EPSP) and inhibitory postsynaptic potentials (IPSP). Laminar distributions of these responses and their latencies wee viewed as the spatiotemporal pattern of spread of excitation and inhibition within the cortex in comparison with those obtained by epicortical stimulation (EPICS). In contrast with activities by EPICS spreading downwards from superficial to deep layers, CP recurrent activities spread upwards from deep to middle or superficial layers, and those by VL afferents spread from middle to both superficial and deep layers bidirectionally. These three intracortical routes shared common cell assemblies in that they received convergent EPSPs or IPSPs to various extents from different inputs. The routes for EPICS and VL inputs were overlapped particularly with abundant supply of convergence in spite of their functional difference. Relevant potentiality of the cerebral network in forming plural patterns was discussed.
在孤立脑猫的实验准备中，刺激大脑脚（CP）和丘脑腹外侧核（VL）。从中央前回皮质神经元记录到的短潜伏期反应包括兴奋性突触后电位（EPSP）和抑制性突触后电位（IPSP）。与皮质表面刺激（EPICS）所获得的反应相比，这些反应的层状分布及其潜伏期被视为皮质内兴奋和抑制传播的时空模式。与EPICS从表层向深层向下传播的活动相反，CP的折返活动从深层向中层或表层向上传播，而VL传入纤维的活动从中层双向传播至表层和深层。这三种皮质内途径共享共同的细胞集合，因为它们在不同程度上从不同输入接收汇聚的EPSP或IPSP。尽管功能不同，但EPICS和VL输入的途径特别重叠，有大量的汇聚供应。讨论了脑网络形成多种模式的相关潜力。
