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您请求的操作仅限于组中的用户:关节面==关节面在椎骨的上突上,关节面在椎骨的下突上。下椎体的上小面在颈椎和胸椎区域相当平坦,在腰椎区域更凸。上椎体相对的下小面凹成拱形,顶点指向椎体,关节小面根据面积不同方向不同:
" '[[颈椎解剖|颈椎区]]" ' = 45度;额平面;所有的动作都是可能的,如屈、伸、侧屈和旋转。颈椎关节面与横平面呈45度,平行于额平面,上关节突面向后向上,下关节突面向前向下。''胸廓'' = 60度;额平面;侧向屈曲和旋转;相邻胸椎间的关节突关节与横平面成60°角,与正平面成20°角,上关节突面向后,略向上、外侧,下关节突面向前、下、中; '''[[Lumbar Anatomy|Lumbar Region]]''' = 90 degrees; sagittal plane; only flexion and extension. The facet joints in the lumbar region lie in the sagittal plane; the articulating facets are at right angles to the transverse plane and 45° to the frontal plane. The superior facets face medially, and the inferior facets face laterally. This changes at the lumbosacral junction, where the apophyseal joint moves into the frontal plane and the inferior facet on L5 faces front. This change in orientation keeps the vertebral column from sliding forward on the sacrumHamill, Joseph, and Kathleen M. Knutzen. Biomechanical Basis of Human Movement, 3rd Ed., USA: Lippincott Williams & Wilkins, 2009.. {| width="100%" cellspacing="1" cellpadding="1" {{#ev:youtube|https://www.youtube.com/watch?v=8zQv2wWcrF0&feature=youtu.be|width}}medeasy 3D Facet Orientation || Cervical, Thoracic, Lumbar Spine #OMM #COMLEX #WeDaBest Available from: https://www.youtube.com/watch?v=8zQv2wWcrF0&feature=youtu.be (last accessed 14.11.2019)

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