例 1,女 ,11岁 ,业余少年体操队员。倒立动作约 2 0ｓ时自觉胸背部酸胀 ,未跌倒而终止倒立 ,当时能行走。约30ｍｉｎ后自觉双下肢无力 ,蹲下时直立困难 ,1ｈ后双下肢完全不能活动 ,8ｈ出现尿潴留。入院体检 :颅神经无异常 ,双上肢肌力 5级 ,双下肢力 0级 ,肌张力低下 ,两膝踝反 Example 1, female, 11 years old, amateur junior gymnastics team. Inverted movement of about 2 0s Conscious chest chest soreness, did not fall and ended upside down, was able to walk. After about 30min conscious lower extremity weakness, squatting upright difficulty, after 1h can not move both lower extremities, 8h urinary retention. Admission medical examination: no abnormal cranial nerves, upper extremity muscle strength 5, double lower extremity 0, low muscle tone, ankle and knees on both knees