Fig. 2.1 Skeletal framework of the back.
Fig. 2.2 Curvatures of the vertebral column.
Cervical curvature(secondary curvature)Thoracic curvature(primary curvature)Lumbar curvature(secondary curvature)Sacral/coccygeal curvature(primary curvature)Gravity lineConcave primarycurvature of backEarly embryoAdultSomites
Fig. 2.3 Back movements.