滑车神经 Trochlear nerve
（重定向自Fourth cranial nerve）
滑车神经是第4对脑神经，编号Ⅳ。
滑车神经为运动性神经，起于中脑下丘平面对侧滑车神经核，自中脑背侧下丘方出脑；自脑发出后，绕过大脑脚外侧前行，穿经海绵窦外侧壁向前，经眶上裂入眶，越过上直肌和上睑提肌向前内侧行，进入并支配上斜肌。
滑车神经是脑神经中最细的神经。
Fourth cranial nerve
中文百科
英语百科
Trochlear nerve 滑车神经
（重定向自Fourth cranial nerve）
The trochlear nerve, also called the fourth cranial nerve or cranial nerve IV, is a motor nerve (a somatic efferent nerve) that innervates only a single muscle: the superior oblique muscle of the eye, which operates through the pulley-like trochlea.
The trochlear nerve is unique among the cranial nerves in several respects:
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