参考词典中pyramidal motor system的常规释义：
基本释义
英英解释
- any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral horn of the spinal cord
[同]
corticospinal tract, pyramidal motor system, pyramidal tract
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