Hoffer M M
Clin Orthop Relat Res. 1980 May(148):94-6.
Fifty neonates were evaluated and followed for 2 years with attention to the passive range of joint motion. Passive range of motion was symmetrical throughout this period. Only the hips were noted to have persistent contractures in flexion and external rotation during these 2 years. Such deformities of the hip make judgements about anteversion in infancy difficult. They also help explain the peculiarity of the lordotic, externally rotated gait seen initially in many toddlers.
对50名新生儿进行了评估，并对其关节被动活动范围进行了为期2年的随访。在此期间，被动活动范围是对称的。在这2年中，仅发现髋关节存在持续性的屈曲和外旋挛缩。这种髋关节畸形使得判断婴儿期的前倾变得困难。它们也有助于解释许多幼儿最初出现的脊柱前凸、外旋步态的特殊性。
