答:后核间性眼肌麻痹表现在一眼不能外展,另一眼内收正常,而内收时出现单眼眼球震颤。后核间性眼肌麻痹的病变部位,有人认为是外展神经副核和外展神经核之间的病变。按此二核密切相挨,有神经纤维相连。但病变仅累及二者中间的神经纤维,颇难理解。有人认为是脑桥网状结构和外展神经核间的病变;有人认为病变位于外展神经核内侧稍上方,累及到外展神经核的斜行锥 A: The posterior intercostal ophthalmoplegia manifested in one can not be outreach, the other adduction normal, while the adduction appears monocular nystagmus. After the nuclear intercostal ophthalmoplegia lesion, it was thought to be between the subdural nerve and abducens nerve nucleus lesions. Click here to get close to the two nuclear, there are nerve fibers connected. However, lesions involving only the middle of the two nerve fibers, quite difficult to understand. Some people think that is the pontine reticular structure and outreach between the nucleus of the lesion; some people think that the lesion is located slightly above the medial side of the abducens nerve nucleus, involving the oblique nucleus abduction cone