Palmer C, Schmidt E M, McIntosh J S
Brain Res. 1981 Mar 30;209(2):305-14. doi: 10.1016/0006-8993(81)90155-4.
Neurons that were antidromically invaded from either pyramidal tract (PT) stimulation or red nucleus (RN) stimulation were studied in the anterior portion of the supplementary motor cortex of anaesthetized rhesus monkeys. The conduction velocity of 58 PT neurons ranged from 11 to 63 m/sec while those of the 29 RN neurons ranged from 10 to 38 m/sec. None of the neurons were found to be antidromically invaded from both stimulation sites. Thus, the corticorubral projection from the SMA does not appear to consist primarily of PT axon collaterals. There appeared to be a trend towards spatial segregation of the PT and RN neurons in the monkey cortex, the RN neurons tended to be located nearer the pial surface than the PT neurons, which tend to have somata nearer the subcortical white matter.
在麻醉的恒河猴辅助运动皮层前部，研究了经锥体束（PT）刺激或红核（RN）刺激逆向侵入的神经元。58个PT神经元的传导速度范围为11至63米/秒，而29个RN神经元的传导速度范围为10至38米/秒。未发现有神经元能被两个刺激部位逆向侵入。因此，辅助运动区向红核的投射似乎并非主要由锥体束轴突侧支构成。在猴皮层中，PT和RN神经元似乎存在空间分隔趋势，RN神经元往往比PT神经元更靠近软膜表面，而PT神经元的胞体往往更靠近皮层下白质。
