Adaptation-induced plasticity and spike waveforms in cat visual cortex
Adaptation-induced plasticity and spike waveforms in cat visual cortex
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DOI：
10.1097/wnr.0b013e32834e7e71
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发表时间：
2012-01-25
期刊：
影响因子：
1.7
通讯作者：
Molotchnikoff, Stephane
中科院分区：
文献类型：
--
作者：
Bachatene, Lyes;Bharmauria, Vishal;Molotchnikoff, Stephane
取向选择神经元在适应非偏好取向后，会改变其偏好取向。调谐曲线峰值的这些移位可以是相对于适配器取向的吸引或排斥方向。在麻醉的猫身上，我们以传统的方式记录了视觉皮质的诱发电反应。记录到的皮层棘波可呈现两种典型波形：规则棘波或快速棘波。然而，没有证据表明棘波的形状与细胞取向调谐曲线的吸引或排斥移位有关。我们的结果表明，适应后，既有吸引又有排斥位移的记录细胞显示出这样或那样的尖峰形状。然而，规则峰电位的移位幅度系统地较高，这被归因于假定的锥体细胞，而快速峰电位的调谐曲线具有较小的幅度，并由假定的中间神经元诱发。神经报告23：88-92(C)2012 Wolters Kluwer Health|Lippincott Williams&Wilkins。
Orientation-selective neurons shift their preferred orientation after being adapted to a nonpreferred orientation. These shifts of the peaks of tuning curves may be in the attractive or repulsive direction in relation to the adapter orientation. In anesthetized cats, we recorded evoked electrical responses from the visual cortex in a conventional manner. The recorded spikes in cortex may present two typical waveforms: regular spikes or fast spikes. However, there is no evidence whether the shapes of spikes are related to the attractive or repulsive shifts of orientation tuning curves of cells. Our results show that after adaptation the recorded cells with both attractive and repulsive shifts display one or the other shape of spike. However, the magnitude of shifts is systematically higher for regular spikes, which is attributed to putative pyramidal cells, whereas tuning curves for fast spikes have smaller magnitudes and are evoked by putative interneurons. NeuroReport 23:88-92 (C) 2012 Wolters Kluwer Health | Lippincott Williams & Wilkins.