are the sacral vertebrae movable
The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).The 24 presacral vertebrae allow movement and hence render the vertebral column flexible.9-10 and 39-11). Five (sometimes six) vertebrae are fused in the adult to form the sacrum, which can be felt below the small of the back.. The sacrum articulates above with L5, laterally with the hip bones, and inferiorly with the coccyx.