意思是：皮质脊髓束；
句子实例：
One monoclonal antibody is in development for potential use in the regeneration of corticospinal tract fibers resulting from an acute spinal injury.
一种在研的单克隆抗体作为潜在的用于急性脊髓损伤的皮质脊髓束纤维再生的药物。
They then descend through the genu and the posterior limb of the internal capsule.This pathway is known as the corticospinal tract.
及后它会下降并穿过内囊的后侧部分，而此路径被称为皮质脊髓束。
