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本实验将WGA-HRP分別注入家兔脊髓一侧的颈、胸、腰等不同节段,逆行追踪小脑中央各核向脊髓的直接投射。结果表明,小脑中央核的标记神经元恒定地见于颈段(C_1～C_4)注入例动物,而未见于下颈段(C_6～C_8)和胸腰段注入例动物。标记神经元仅出现于注入侧对侧的小脑顶核及间位核的尾侧部。研究结果提示,家兔小脑顶核及间位核的尾侧部,有向颈髓的直接越边投射。本结果为进一步探讨小脑对躯体运动的调节功能提供形态学基础。
In this experiment, WGA-HRP were injected into the spinal cord of rabbits one side of the neck, chest, waist and other different segments, retrograde tracing the central cerebellar nuclei to the spinal cord direct projection. The results showed that the labeled neurons in the central nucleus of the cerebellum were always seen in the cervical region (C_1 ~ C_4), but not in the lower cervical region (C_6 ~ C_8) and the thoracolumbar region. The labeled neurons only appear on the caudal part of the parietal and intermediate nuclei on the contralateral side of the implanted side. The results suggest that the rabbit caudate nucleus and the dorsal part of the metacentric nucleus, there is a direct lateral projection of the cervical spinal cord. The results provide morphological basis for further exploring the regulatory function of the cerebellum on somatic motor.