n.肌张力缺失

amyotonia congenita → 先天性肌张力不全症；先天性肌弛缓
congenital amyotonia syndrome → 综合征；肌缓和分析征
amyotonia a → 肌弛缓
amyotonia congenital → 先天性肌无张力症
congenital amyotonia → 先天性肌张力缺失

【Noun】

1. lack of normal muscular tension or tonus