Luppino G, Matelli M, Camarda R, Rizzolatti G
Istituto di Fisiologia Umana, Università di Parma, Italy.
Neuroreport. 1994 Dec 20;5(18):2545-8. doi: 10.1097/00001756-199412000-00035.
We injected neural tracers into the lateral funiculus of the spinal cord in order to relate the sites of origin of the spinal projections from the mesial cortical surface with the cytoarchitectonic organization of this region. We found a close correlation between the origin sites and density of corticospinal projections and the areal organization. The areas most densely labelled were F3 (SMA-proper) and area 24d, whereas F6 (pre-SMA) and area 24c showed a low density of labelling. The segmental topography of the corticospinal projections fitted well with the somatotopy of the mesial cortical areas. We conclude that in the agranular mesial cortex there are four independent motor representations: F3 and 24d where the whole body is represented, and F6 and 24c which are mostly related to arm movements.
我们将神经示踪剂注入脊髓侧索，以便将来自内侧皮质表面的脊髓投射起源部位与该区域的细胞构筑组织联系起来。我们发现皮质脊髓投射的起源部位和密度与区域组织之间存在密切相关性。标记最密集的区域是F3（中央前运动区）和24d区，而F6（前中央前运动区）和24c区的标记密度较低。皮质脊髓投射的节段性拓扑结构与内侧皮质区域的躯体定位非常吻合。我们得出结论，在无颗粒的内侧皮质中有四种独立的运动表征：F3和24d区代表全身，F6和24c区主要与手臂运动有关。
