Amabile Celia, Le Huec Jean-Charles, Skalli Wafa
Arts et Métiers ParisTech, LBM/Institut de Biomécanique Humaine Georges Charpak, 151 bd de l'Hôpital, 75013, Paris, France.
Orthospine Department 2, Université Bordeaux, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France.
Eur Spine J. 2018 Feb;27(2):458-466. doi: 10.1007/s00586-016-4830-8. Epub 2016 Nov 2.
The aim was to quantify the postural alignment of asymptomatic elderly, in comparison to a reference population, searching for possible invariants and compensatory mechanisms.
41 volunteers (49-76 years old) underwent bi-planar X-rays with 3D reconstructions of the spine and pelvis. Alignment parameters were compared with those of a reference group of asymptomatic subjects younger than 40 years old, with a particular focus on center of acoustic meati (CAM) and odontoid (OD) with regard to hip axis (HA). Possible markers of compensation were also investigated.
No significant difference among groups appeared for CAM-HA and OD-HA parameters. Twenty four percent of elders had an abnormally high SVA value and twenty seven percent had an abnormal global spine inclination. Increased pelvic tilt and cervical lordosis allowed maintaining the head above the pelvis.
CAM-HA and OD-HA appeared quasi-invariant even in asymptomatic elderly. Some subjects exhibited alteration of spine alignment, compensated at the pelvis and cervical regions.
本研究旨在量化无症状老年人的姿势对齐情况，并与参考人群进行比较，寻找可能的不变量和代偿机制。
41名志愿者（49 - 76岁）接受了脊柱和骨盆的双平面X射线及三维重建检查。将对齐参数与一组年龄小于40岁的无症状参考组受试者的参数进行比较，特别关注听眦线（CAM）和齿状突（OD）相对于髋关节轴（HA）的情况。还研究了可能的代偿标志物。
CAM - HA和OD - HA参数在各组之间未出现显著差异。24%的老年人矢状面垂直轴（SVA）值异常高，27%的老年人整体脊柱倾斜异常。骨盆倾斜增加和颈椎前凸增加使得头部保持在骨盆上方。
即使在无症状老年人中，CAM - HA和OD - HA似乎也近乎不变。一些受试者表现出脊柱排列改变，并在骨盆和颈椎区域得到代偿。
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