1病例患者女性,13岁,因双下肢无力11年就诊。患者1岁半时学会走路,家长发现其步态不稳,易跌倒,跌倒后尚能自行站起,逐渐出现上下楼梯费力,蹲下起立需扶助,后出现穿拖鞋易掉落,尚能行走,但较慢,不能进行体育活动;肢体无麻木疼痛、肉跳感,无吞咽困难、饮水呛咳等。出生史及既往史 A case of female patients, aged 13, due to weakness in both lower extremities treatment for 11 years. Patients 1 and a half years to learn to walk, parents found that their gait instability, easy to fall, still able to stand up after falling, and gradually stepped up and down the stairs effort, squat up and need help, after wearing slippers easy to fall, still able to walk , But slower, unable to carry out physical activity; limb numbness pain, physical and sensory, no difficulty swallowing, drinking cough and so on. Birth history and past history