Broughton N S, Wright J, Menelaus M B
Department of Orthopaedics, Royal Children's Hospital, Melbourne, Australia.
J Pediatr Orthop. 1993 Mar-Apr;13(2):263-4.
Fifty-seven normal neonates were examined at birth and at 3 and 6 months (to within 7 days). Range of knee motion and of hip flexion contracture were measured. Mean knee flexion contracture was 21.4 degrees at birth, reducing to 10.7 degrees at 3 months and 3.3 degrees at 6 months. Decreasing range of knee flexion was noted in the same period. The natural history of normal knee motion is important in interpreting findings in patients with neuromuscular disorders.
对57名正常新生儿在出生时、3个月和6个月（误差在7天内）进行了检查。测量了膝关节活动范围和髋关节屈曲挛缩情况。出生时膝关节平均屈曲挛缩为21.4度，3个月时降至10.7度，6个月时降至3.3度。同期观察到膝关节屈曲范围减小。正常膝关节活动的自然病程对于解释神经肌肉疾病患者的检查结果很重要。
