The coccyx is the final bone in the vertebral column that surrounds the spinal cord. ... It comprises three to five separate or fused coccygeal vertebrae below the sacrum, attached to the sacrum by a fibrocartilaginous joint, the sacrococcygeal symphysis, which permits limited movement between the sacrum and the coccyx.
Background. Despite its small size, the coccyx has several important functions. Along with being the insertion site for multiple muscles, ligaments, and tendons, it also serves as one leg of the tripodââ¬âalong with the ischial tuberositiesââ¬âthat provides weight-bearing support to a person in the seated position.
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