ORGANIZATION OF A 4TH SOMATOSENSORY AREA OF CORTEX IN CAT
ORGANIZATION OF A 4TH SOMATOSENSORY AREA OF CORTEX IN CAT
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DOI：
10.1152/jn.1983.50.4.910
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发表时间：
1983-01-01
影响因子：
2.5
通讯作者：
STEIN, BE
中科院分区：
文献类型：
--
作者：
CLEMO, HR;STEIN, BE
采用单单位记录技术研究了猫前外侧裂沟（AES）皮层感觉表征的组织结构。在AES中发现了体细胞、听觉细胞和视觉细胞，但部分分离。体细胞集中分布于前2/3沟，听细胞分布于后1/3沟，视细胞沿着底分布。在AES中观察到一种独特的、迄今为止未知的体表躯体位置表示，并将其命名为SIV。SIV中身体的表征沿着一个吻尾轴延伸，整个躯体位置图是颠倒的，头部在吻侧，后躯在尾侧。爪子的代表延伸到唇沟邻接爪子表示在SII，和SIV-SII边界是由一个反转的顺序沿AEG-AES的感受野沿着。在外侧前回（AEG）的冠状面上，SIV代表与相邻代表（SII）是分开的。发现SII中的躯体位置图在AEG上比一些研究人员所示的更向外侧延伸，并且它包含肢体的双重表示：一个较大的表示，其中肢体具有与SIV图相反的方向并邻接SIV图，另一个较小的表示位于AEG上更内侧并延伸到上裂沟。这种双重代表性的存在可能有助于解释以前关于SII中身体总体方向的差异。
The organization of sensory representations in the cortex of the anterior ectosylvian sulcus (AES) of the cat was investigated using single-unit recording techniques. Somatic, auditory, and visual cells were found in the AES but were partially segregated. Somatic cells were concentrated in the rostral 2/3 of the sulcus, auditory cells were found in the caudal 1/3 and visual cells were distributed along the fundus. A distinct, heretofore unknown, somatotopic representation of the body surface was observed in the AES and was designated SIV. The representation of the body in SIV extends along a rostrocaudal axis and the entire somatotopic map is inverted, with the head rostral and the hindquarters caudal. The representation of the paws extends over the lip of the sulcus to abut the paw representations in SII, and the SIV-SII boundary is marked by a reversal in the sequence of receptive fields along the AEG-AES. The SIV representation is separate from the adjacent representation (SII) on the crown of the anterior ectosylvian gyrus (AEG). The somatotopic map in SII was found to extend further laterally on the AEG than shown by some investigators and it contains a double representation of the limbs: a large representation with the limbs having the opposite orientation to and abutting the SIV map and a smaller representation located more medial on the AEG and extending into the suprasylvian sulcus. The presence of this double representation may help to explain previous discrepancies regarding the overall orientation of the body in SII.