先证者　男 ,10岁 ,足月顺产 ,第 1胎 ,无窒息史 ,体格及智力发育差。两岁多会行走 ,行走困难呈鸭步。 3岁前被叫名字时有反应 ,并能随母亲叫其父亲名字。其后 ,对外界无反应 ,不理解问话。平时好动 ,喜躺坐地上。好咬牙 ,咬鞋。查体 :注意力不集中 ,目光涣散。情感反应差 ,被? Male probands, 10 years old, full-term follow-up, the first child, no history of asphyxia, poor physical and mental development. Two-year-old will walk more difficult to walk ducks. 3 years ago was called when the name response, and with his mother called his father’s name. Since then, no response to the outside world, do not understand the questioning. Usually good move, hi lying on the ground. Good teeth, biting shoes. Physical examination: Inattention, blurred vision. Emotional reaction is poor, was?