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病例摘要例1：男，15个月，系第1胎第1产，足月顺产，出生时哭声不大，生后第一个月发现其四肢活动较少，且比正常儿无力，头能转动，满月后四肢活动无力加重．头转动困难，之后，四肢逐渐不能活动，头抬不起，四肢及躯干皮肤松弛，肌肉萎缩，1岁时会叫“芭”、‘“妈”，l岁2?
Case summary 1: male, 15 months, the first child of the first production, full-term birth, cries at birth is not big, the first month after birth found that his limbs less activity, and more than normal children weakness, head Can rotate, limb activity after the full moon weakness. Head rotation difficulties, then gradually unable to move the limbs, head can not afford to lift, limbs and trunk skin relaxation, muscle atrophy, 1 year old will be called “Ba”, “Mom”, l years old 2?