The correlation analysis of the cervical spine alignment, flexion ROM of adjacent segments with the spinal cord atrophy in Hirayama disease

English Keywords:Hirayama disease  Cervical spine alignment  Flexion ROM of adjacent segments  Spinal cord atrophy  The correlation analysis

English Abstract:

  【Abstract】 Objectives: To investigate the relationship of cervical curvature, flexion ROM of adjacent segment with spinal cord atrophy of Hirayama disease, and to provide rationale for its surgical management. Methods: 36 consecutive patients underwent flexion X-ray and neutral position cervical MRI. The radiological measurement included the cervical spine alignment from C2 to C7 and the arc chord distance(ACD) by the Borden′s method, flexion ROM of adjacent segments by calculating the difference between neutral and flexion position of Cobb angle defined as the tangent of the posterior body line of every two adjacent segments from C3-C7, observing spinal cord atrophy on sagittal position MRI and measuring the cross-sectional area of spinal from C3-C7 on neutral position cervical MRI. According to the ACD of cervical curvature, all patients were divided into 4 groups: 7mm≤ACD≤17mm, normal cervical spine alignment; 1mm