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IPSP-EPSP interactions in lateral geniculate neurons of rat

Chinese Science Bulletin 1996年第13期41卷 1116-1123页

作者：夏军罗茀荪 Shanghai Brain Research Institute Chinese Academy of Sciences Shanghai 200031 China

It has been demonstrated that the lateral geniculate nucleus (LGN) of the cat possesses two types of inhibitory circuits: feedforward and recurrent inhibitory circuits. The results obtained from brain slice experiments have shown that the rat LGN also has the feedforward inhibitory circuit, which mediates an inhibitory postsynaptic potential (IPSP)

关键词： lateral geniculate nucleus postsynaptic potential feedforward inhibition recurrent inhibition shunting effect GABA receptor.

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After hyperpolarization of relay neurons in lateral geniculate nucleus of cat

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Chinese Science Bulletin 1996年第18期41卷 1554-1558页

作者：罗茀荪 Shanghai Brain Research Institute Chinese Academy of Sciences Shanghai 200031 China

The action potential （Na+ spike） of neurons is often followed by a compound after hyperpolarization （AHP） which is mediated by Ca2+-dependent K+ channels. Pyramidal cells in the cerebral cortex are known to have fast, medium and slow AHPs. It is commonly accepted that the fast AHP （fAHP） is mediated by a kind of C- or BK-K+ channels. The fAHP is characterized by a short duration of about 20 ms, its remarkable voltage dependence and sensitivity to low concentration （+ channels and has a long duration over 200 ms. It is poorly voltage-dependent and blocked by Apamin, but not by TEA.

关键词： lateral geniculate nucleus action potential brain slice after hyperpolarization.

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Temporal properties of pattern adaptation of relay cells in the lateral geniculate nucleus of cats

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Chinese Science Bulletin 2001年第17期46卷 1463-1465页

作者： YANG Yupeng JIN Jianzhong ZHOU Yifeng SHOU Tiande Vision Research Laboratory School of Life SciencesUniversity of Science and Technology of ChinaHefei 230027China Vision Research Laboratory and Liren Laboratory Center for Brain Science ResearchSchool of Life SciencesFudan UniversityShanghai 200433China Laboratory of Visual Information Processing Institute of BiophysicsChinese Academy of SciencesBeijing 100101China

The temporal properties of pattern adaptation of relay cells induced by repeated sinusoidal drifting grating were investigated in the dorsal lateral geniculate nucleus (dLGN) of cats. The results showed that the response amplitude declined and the response latency prolonged when relay cells were pattern-adapted in dLGN, like the similar findings in visual cortex. However, in contrast to the result in cortex, the response phase of relay cells advanced. This implies that an inhibition with relatively long latency may participate in the pattern adaptation of dLGN cells and the adaptation in dLGN may be via a mechanism different from that of visual cortex.

关键词： pattern adaptation temporal properties latency phase lateral geniculate nucleus cat.

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