Rett's Disorder (氏疾患)

A. All of the following (所有以下现象):
(1) apparently normal prenatal and perinatal development
出生前后的发育明显正常;
(2) apparently normal psychomotor development through the first 5 months after birth
出生的头5个月的精神和运动发育明显正常;
(3) normal head circumference at birth
出生时的头围正常
B. Onset of all of the following after the period of normal development:
在正常发育期后以下所有异常开始发生:
(1) deceleration of head growth between ages 5 and 48 months
在五到48个月期间头部增长开始下降;
(2) loss of previously acquired purposeful hand skills between ages 5 and 30 months with the subsequent development of stereotyped hand movements (e.g., hand-wringing or hand washing)
在5到30个月期间,以前所获得的自主的手部捕技能消失,取而代之的是不自主的刻板运动;
(3) loss of social engagement early in the course (although often social interaction develops later)
与人的交流能力丢失
(4) appearance of poorly coordinated gait or trunk movements
躯体运动协调性变差
(5) severely imapired expressive and receptive language development with severe psychomotor retardation
语言的表达和理解能力严重障碍,并伴随精神运动系统发育的严重延迟