REPRESENTATION OF HEAD AND FACE IN POSTCENTRAL GYRUS OF MACAQUE
REPRESENTATION OF HEAD AND FACE IN POSTCENTRAL GYRUS OF MACAQUE
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DOI：
10.1152/jn.1975.38.3.714
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发表时间：
1975-01-01
影响因子：
2.5
通讯作者：
WHITSEL, BL
中科院分区：
文献类型：
--
作者：
DREYER, DA;LOE, PR;WHITSEL, BL
通过细胞外记录技术确定中央后回（SI）头部和面部区域的细胞结构和地形细分内单个神经元的感受野和亚模态特征。单个单元数据与记录电极皮质内位置的相关性提供了对几个细胞结构不同区域中每个区域内的功能组织的详细描述，这些区域有助于在 SI 中表示头部和面部。数据表明，从三叉神经机械感受器接收主要输入的 SI 皮层的功能组织与从四肢、躯干和尾部的机械感受器接收输入的 SI 区域内的组织相当。在 SI 皮层的每个地形细分中 1) 外围的单个区域在相距较远的位置多次出现，每次都在不同的子模态和外围感受野的背景下； 2) 属于不同子模态类别的神经元被隔离，以便来自皮肤传入神经的投射主要终止于区域 1 相邻前部的细胞结构区域 3，而来自支配深层组织的传入神经的投射主要终止于细胞结构区域 3a、区域 2 和每个 1 的后部。大多数身体区域投射到 SI 内多个广泛分离的区域，感受野仅限于三叉神经周围神经支配场的眼部的神经元被发现在前中央后回冠的限制区域内，该区域关于细胞结构区域 1 和 3 的交界处对称定位。感受野仅限于三叉神经支配场的上颌部的神经元被发现在皮质环内，该环 a) 完全包围眼部的表征域，b) 包括细胞结构区 2、1、3 和 3a 的部分。 SI 神经元的感受野仅限于三叉神经支配场的下颌部分，占据 SI 面部区域的最大部分，并形成一圈皮质细胞柱，完全包围该皮质区域，该皮质区域接收来自上颌周围神经支配场的输入。
The receptive field and submodality characteristics of individual neurons within the cytoarchitectural and topographic subdivisions of the head and face areas of the postcentral gyrus (SI) were determined with the technique of extracellular recording. Correlation of the single-unit data with the intracortical location of the recording electrode provided a detailed description of the functional organization within each of the several cytoarchitecturally distinct regions contributing to the representation of the head and face in SI. The data indicate that the functional organization of the SI cortex which receives its principal input from trigeminal mechanoreceptors is comparable to the organization within those SI regions which receive their input from the mechanoreceptors of the limbs, trunk, and tail. In each topographic subdivision of the SI cortex 1) a single region in the periphery is represented several times in widely separated locations, each time in a context of different submodalities and peripheral receptive fields; and 2) neurons belonging to the different submodality classes are segregated so that projections from cutaneous afferents terminate mainly in cytoarchitectural area 3 in the adjacent anterior portion of area 1, while projections from the afferents innervating deep tissues terminate mainly in cytoarchitectural area 3a, area 2, and the posterior part of each 1. Although the mechanoreceptor input to SI is segregated according to submodality and the mechanoreceptors from most body regions project to multiple widely separated regions within SI, neurons with receptive fields confined to the ophthalmic division of the trigeminal peripheral innervation field are found within a restricted region of the anterior postcentral gyral crown which is positioned symmetrically about the junction of cytoarchitectural areas 1 and 3. Neurons with receptive fields confined to the maxillary division of the trigeminal innervation field are found within a ring of cortex which a) completely surrounds the representation of the ophthalmic field, and b) includes parts of cytoarchitectural area 2, 1, 3, and 3a. SI neurons with receptive fields restricted to the mandibular division of the trigeminal innervation field occupy the largest portion of the SI face area and form a ring of cortical cell columns which completely surrounds that cortical region which receives its input from the maxillary peripheral innervation field.