Neuron densities vary across and within cortical areas in primates
Neuron densities vary across and within cortical areas in primates
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DOI：
10.1073/pnas.1010356107
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发表时间：
2010-09-07
影响因子：
11.1
通讯作者：
Kaas, Jon H.
中科院分区：
文献类型：
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作者：
Collins, Christine E.;Airey, David C.;Kaas, Jon H.
对两只原猴、一只新世界鸮猴、一只旧世界猕猴和一只狒狒的单个皮层半球，测定了皮层各区域和区域神经元的数量和比例。结果表明，在这里所研究的物种中，有一个共同的皮层组织计划，也有一些差异表明，旧大陆猴子有更大的特殊化。在所有灵长类动物中，初级视觉皮层（V1）是神经元密度最高的皮质区域，次级视觉区域的神经元密度高于平均水平。旧大陆猕猴和狒狒的初级听觉和体感区域往往密度较高。与旧大陆的猴子相比，原猴加拉戈斯皮层区域的神经元密度变化较小。因此，皮层结构在灵长类物种内部和不同物种之间差异很大，但细胞密度在用于感觉处理早期阶段的皮层中更大。
The numbers and proportion of neurons in areas and regions of cortex were determined for a single cortical hemisphere from two prosimian galagos, one New World owl monkey, one Old World macaque monkey, and one baboon. The results suggest that there is a common plan of cortical organization across the species examined here and also differences that suggest greater specializations in the Old World monkeys. In all primates examined, primary visual cortex (V1) was the most neuron-dense cortical area and the secondary visual areas had higher-than-average densities. Primary auditory and somatosensory areas tended to have high densities in the Old World macaque and baboon. Neuronal density varies less across cortical areas in prosimian galagos than in the Old World monkeys. Thus, cortical architecture varies greatly within and across primate species, but cell density is greater in cortex devoted to the early stages of sensory processing.