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【正文】 Conus medullaris syndrome 脊髓圓錐（骶 3～ 5和尾節(jié)） ? Pain usually bilateral and not senere ? Sensory distribution in bilateralsaddleshaped area會陰部馬鞍狀感覺缺失，肛門反射消失和性功能障礙 ? Muscle changes not marked。indirect) ? Associated signs: ptosis(partial or plete), Pyramidal dysfunction Associalted contralateral hemiplegia(對側(cè)偏癱 ) 2. Parinaud’s syndrome Dorsal midbrain lesion( The superior colliculus and pretectal area,上丘頂蓋 ) ： eyes: upward or downward gaze paralysis. (上下凝視障礙 ) pupillary disturbance(瞳孔散大 ) absence of convergence（輻輳反射缺失） often the result of a pinealoma(松果體瘤） press the epithalamus and subthalamus(上下丘 ) brain stemPons腦 橋 MillardGubler syndrome腦橋腹下 皮質(zhì)脊髓束 內(nèi)側(cè)丘系 外展 N 面 N 上下肢感覺障礙 偏癱 (1):MillardGubler Syndrome ? Anterior inferior cerebellar artery lesion(小腦前下 A) ? 6, 7th cranial nerve damage ipsilateral to side of the lesion(病側(cè) 6,7顱 N) ? Associalted contralateral hemiplegia(對側(cè)偏癱 ) ? Ipsilateral ataxia(cerebellar signs,同側(cè)小腦征 ) (2): Lockedin syndrome 閉鎖綜合征 ? a lesion of the ventral pons interrupts , ? corticobular and corticospinal pathways, with sparin
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