curvature of the spine
Curvature of the spine is an exaggerated shaping of the spinal column. There are three major types. Scoliosis, or lateral curvature, can be due to bad posture or abnormality. Lordosis, an accentuation of the inward curve of the neck region or more commonly of the lower back region, results in a sway-back appearance. Kyphosis, ana accentuation of the outward curve behind the chest, can in severe form result in a hunchback appearance.