Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA.
Proc Natl Acad Sci U S A. 2010 Sep 7;107(36):15927-32. doi: 10.1073/pnas.1010356107. Epub 2010 Aug 23.
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.
我们测定了来自两种灵长类原猴、一种新世界猴、一种旧世界猴和一种狒狒的单个大脑半球皮质各区域和部位的神经元数量和比例。结果表明，在所检查的这些物种中，皮质组织存在着共同的模式，也存在着差异，这表明旧世界猴的特化程度更高。在所有检查过的灵长类动物中，初级视皮层（V1）是神经元密度最高的皮质区域，而次级视区的密度高于平均水平。初级听觉和躯体感觉区在旧世界猴和狒狒中倾向于具有较高的密度。原猴灵长类动物的皮质各区之间的神经元密度变化小于旧世界猴。因此，皮质结构在灵长类动物内部和之间变化很大，但专门用于感觉处理早期阶段的皮质中的细胞密度更大。
