Huerta M F, Harting J K
Brain Res. 1982 Jun 24;242(2):326-31. doi: 10.1016/0006-8993(82)90317-1.
Anterograde transport experiments reveal two novel findings regarding the distribution of descending tectofugal axons. First, such axons project to the supraspinal nucleus of the caudal medulla; this nucleus is known to project to the upper cervical spinal cord gray. Second, some tectospinal axons ramify within Rexed's lamina IX of the first 5 cervical spinal cord segments. This zone contains motoneurons which innervate neck musculature. Retrograde data reveal that tectospinal neurons occur in clusters within the intermediate and deep gray layers. A close relationship between the clusters of tectospinal neurons and a modular type of connectional organization of the intermediate and deep gray layers is suggested.
顺行运输实验揭示了关于下行顶盖离皮质轴突分布的两个新发现。第一，此类轴突投射至延髓尾端的脊髓上核；已知该核投射至上颈段脊髓灰质。第二，一些顶盖脊髓轴突在前5个颈段脊髓节段的 Rexed IX层内分支。该区域包含支配颈部肌肉组织的运动神经元。逆行示踪数据显示，顶盖脊髓神经元成群地出现在中间层和深层灰质内。这表明顶盖脊髓神经元群与中间层和深层灰质的模块化连接组织类型之间存在密切关系。
