Rüegg D G, Eldred E, Wiesendanger M
J Comp Neurol. 1978 May 15;179(2):383-91. doi: 10.1002/cne.901790208.
In the cat, a spinal projection to a restricted area of the basilar pontine grey has been revealed with use of anterograde degeneration technique (Fink-Heimer). The area was ipsilateral to the spinal lesion, restricted to the far caudal limit of the pons, and included the dorsal and the dorsolateral subdivisions of the pontine nuclei (PN). Comparisons following high cervical, midthoracic and upper lumbar spinal lesions did not reveal any somatotopic organization. Only a few spinopontine fibers had origins below segmental level L4. Lesions of various quadrants of the cord indicated that the spinopontine fibers ascended through the dorsolateral funiculus, and not through either the dorsal or the ventral funiculi. Comparison with the degeneration effects of cerebral cortical lesions showed that the spinal projection to the PN overlapped to some extent with the projection from the first sensorimotor and second somatosensory cortices. In the rat no comparable spinopontine projection was found. It is suggested that the spinopontine pathway might forward information to the cerebellum from visceral sensory receptors or perhaps from pools of spinal interneurons.
在猫身上，运用顺行性变性技术（芬克 - 海默法）已揭示出脊髓向脑桥基底灰质一个局限区域的投射。该区域位于脊髓损伤的同侧，局限于脑桥最尾端界限处，且包括脑桥核（PN）的背侧和背外侧亚区。高位颈髓、胸髓中部和腰髓上部损伤后的比较未发现任何躯体定位组织。仅有少数脊髓脑桥纤维起自L4节段以下水平。脊髓不同象限的损伤表明，脊髓脑桥纤维通过背外侧索上行，而非通过背索或腹索。与大脑皮质损伤的变性效应比较显示，脊髓向脑桥核的投射在一定程度上与第一感觉运动皮质和第二躯体感觉皮质的投射重叠。在大鼠身上未发现类似的脊髓脑桥投射。有人提出，脊髓脑桥通路可能将信息从内脏感觉感受器或者或许从脊髓中间神经元池传递至小脑。
