患儿,男,1岁8个月。2胎2产,足月顺产,出生时无异常发现。生后至今一直不能独坐及站立,不能说话。头围43cm,身高80cm,营养良好,表情呆滞,无视力,活动后肌张力增高,肌力正常,双手握拳,四肢及心、肺、腹无异常,原发性视神经萎缩,一侧隐睾。母孕期仅患过轻微感冒,口服过感冒药。家族史:父身 Children, male, 1 year and 8 months. 2 births 2, full-term follow-up, no abnormalities were found at birth. Has been unable to sit alone and standing after birth, can not speak. Head circumference 43cm, height 80cm, well-nourished, dull expression, no sight, increased muscle tone after activity, muscle strength, fist with both hands, limbs and heart, lung, abdomen without exception, primary optic atrophy, cryptorchidism on one side. Pregnancy only suffered from mild cold, oral cold medicine. Family history: father body