Object selectivity of local field potentials and spikes in the macaque inferior temporal cortex
Object selectivity of local field potentials and spikes in the macaque inferior temporal cortex
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DOI：
10.1016/j.neuron.2005.12.019
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发表时间：
2006-02-02
期刊：
影响因子：
16.2
通讯作者：
DiCarlo, JJ
中科院分区：
文献类型：
--
作者：
Kreiman, G;Hung, CP;DiCarlo, JJ
局部场电位(LFP)主要来自大脑区的树突活动，因此提供了一个区域内输入和局部处理的量度。我们描述了猴下颞叶皮质(IT)的LFP及其与棘波(多单位和单单位)的关系。IT对复杂物体的LFP反应在44%的部位表现出很强的选择性，并对视网膜的位置和大小具有耐受性。LFP偏好不能很好地用同一部位的穗偏好来预测，但能更好地解释3 mm以内的平均穗。对不同地点的比较表明，穗的选择性类似于800微米，LFP的选择性类似于5毫米。这些观察结果表明，对IT神经元的输入传递了对复杂形状的选择性，并且这种输入可能具有跨越几毫米的潜在组织。
Local field potentials (LFPs) arise largely from dendritic activity over large brain regions and thus provide a measure of the input to and local processing within an area. We characterized LFPs and their relationship to spikes (multi and single unit) in monkey inferior temporal cortex (IT). LFP responses in IT to complex objects showed strong selectivity at 44% of the sites and tolerance to retinal position and size. The LFP preferences were poorly predicted by the spike preferences at the same site but were better explained by averaging spikes within similar to 3 mm. A comparison of separate sites suggests that selectivity is similar on a scale of similar to 800 mu m for spikes and similar to 5 mm for LFPs. These observations imply that inputs to IT neurons convey selectivity for complex shapes and that such input may have an underlying organization spanning several millimeters.