These muscles help support the anus and aid in defecation, support the vagina in females, and assist in walking, running, and moving the legs. Coccydynia is generally much more common in women; some sources from the medical literature find that women are five times more likely to develop coccydynia than men. See Types of Back Pain in Pregnancy. Pelvic muscle cramps can also play a role in increased coccyx pain in women.
In physical evaluations, women have reported significantly increased coccyx pain during the premenstrual period. Understanding Low Back Pain Lumbago. Back Care for Lower Back Pain. Spinal Anatomy and Back Pain. You are here Conditions Spine Anatomy. Anatomy of the Coccyx Tailbone share pin it Newsletters. Structure of the coccygeal vertebral junctions is variable and age-related, ranging from fully developed to rudimentary intervertebral discs with varying degrees of cystic or fibrotic change, to fusion of the vertebrae in the later decades.
The coccyx consists of an anterior and posterior surface, two lateral surfaces, an apex and a base. Movement is passive minor flexion and extension and the joint typically fuses with age.
The coccyx arises from a caudal eminence present from weeks of gestation. This caudal eminence regresses by birth, leaving the four precursor vertebrae. Ossification takes place from the center of each precursor vertebra, with the cornua ossifying from separate centers.
The first segment appears between ages one to four years, the second between ages five to ten years, the third between ten and fifteen years, and the fourth between fourteen and twenty years.
Segments do not unite until after age twenty-five or thirty. The coccyx only fuses with the sacrum late in life, and this occurs more prevalently in females than in males. Anatomy: Abdominopelvic. Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Updating… Please wait. Unable to process the form. Check for errors and try again. Thank you for updating your details. Log In. Sign Up.
Become a Gold Supporter and see no ads. Log in Sign up. Articles Cases Courses Quiz. About Recent Edits Go ad-free. Edit article. The vertebral column, also called the spine or backbone, is made up of multiple vertebrae that are separated by spongy disks. The spine is classified into 4 distinct areas. The pelvis is a basin-shaped structure that supports the spinal column and protects the abdominal organs. It contains the following:.
A spade-shaped bone that is formed by the fusion of 5 originally separate sacral vertebrae. Coccyx also called the tailbone.
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