It is a normal curvature of the spine of the human body in the lumbar area, in the same sense that cervical lordosis cervical height and facing two curvatures called kyphosis, one at the level of the ribs and another in the sacral area. These curves would be visible in a lateral x-ray of the trunk in which the column insinuaría a s given our presumed subject front us facing to the left. Therefore the spine is curved slightly forward and backward; But if the curvature is to the right or to the left it would be escolioticas, abnormal curvature. The medical term is scoliosis.
