１７６．为什么上斜肌麻痹最为常见？各种眼外肌麻痹中，以上斜肌麻痹最为常见。因为上斜肌受滑车神经支配，该神经在颅内段走行最长，且滑车位于眼眶前方的表浅部，最易遭受外伤及眶内炎症的侵犯。先天性者多见于儿童，且常为部分性，多属滑车神经发育不全；滑车神经或上... 176. Why the upper oblique paralysis is the most common? All kinds of extraocular muscle paralysis, the most common oblique paralysis. Because the upper oblique muscle is dominated by the trochlea, the nerve travels the longest in the intracranial segment, and the trochlea is located in the superficial part in front of the orbit, most likely to be inflicted with trauma and orbital inflammation. Congenital were more common in children, and often part-time, mostly belongs to the pulley neurological hypoplasia;