VISUALLY EVOKED CALCIUM ACTION-POTENTIALS IN CAT STRIATE CORTEX

VISUALLY EVOKED CALCIUM ACTION-POTENTIALS IN CAT STRIATE CORTEX
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DOI:
10.1038/378612a0
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发表时间:
1995-12-07
期刊:
影响因子:
64.8
通讯作者:
REID, RC
REID, RC
中科院分区:
综合性期刊1区
文献类型:
--
作者:
HIRSCH, JA;ALONSO, JM;REID, RC

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大脑皮层神经元的早期细胞内研究表明,突触输入会激发树突动作电位,向体细胞传递信息(1)。随后的体外研究证实新皮质神经元产生树突 Ca2+ 动作电位(2-5)。为了确定自然刺激是否会引起 Ca2+ 尖峰,我们结合了全细胞记录 (6,7)、药理学 (8) 和定量感受野绘图 (9) 技术。我们的研究结果表明,视觉刺激通常会在猫纹状皮层 (12) 不同层的不同功能 (10) 和解剖 (11) 类别的细胞中引起 Ca2+ 尖峰。因此,再生 Ca2+ 电位似乎在皮质感觉处理的初始和后期阶段都发挥着作用。
EARLY intracellular studies of cerebral cortical neurons indicated that synaptic input evokes dendritic action potentials that convey information towards the soma(1). Subsequent work in vitro established that neocortical neurons produce dendritic Ca2+ action potentials(2-5). To determine whether natural stimuli elicit Ca2+ spikes, we combined the techniques of whole-cell recording(6,7), pharmacology(8) and quantitative receptive field mapping(9). Our findings show that visual stimulation routinely evoked Ca2+ spikes in distinct functional(10) and anatomical(11) classes of cells in different layers of the cat striate cortex(12). Hence regenerative Ca2+ potentials appear to play a role in both the initial and later stages of cortical sensory processing.