The sacrum is made of five fused vertebrae configured as an inverted triangular bone that is concave anteriorly and convex posteriorly. There are five sacral vertebrae, which are fused together.
Together with the iliac bones, they form a ring called the pelvic girdle. Coccyx region — the four fused bones of the coccyx or tailbone provide attachment for ligaments and muscles of the pelvic floor.
Updated March An evaluation of two different methods of coccygectomy in patients with traumatic coccydynia. J Pain Res. Influence of adequate pelvic floor muscle contraction on the movement of the coccyx during pelvic floor muscle training. J Phys Ther Sci. Published Jun Magnetic resonance imaging findings in the painful adult coccyx. Acute traumatic instability of the coccyx: results in 28 consecutive coccygectomies.
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Related Articles. Why Your Tailbone Hurts. The Anatomy of the Sacrum. The Importance of the Sacral Vertebrae. Insufficiency Fractures: Types, Causes, and Treatment.
The coccyx also functions to support and stabilize a person while he or she is in a sitting position. The coccyx may be fractured when a person falls abruptly on his or her buttocks. A qualified medical professional may prescribe pain medication until the coccyx heals. In extreme cases, the coccyx may need to be surgically removed. This procedure is called a coccygectomy. The supraspinatus muscle is a rotator cuff muscle located in the shoulder, specifically in the supraspinatus fossa, a concave depression in the rear….
The quadratus plantae is a muscle in the foot that extends from the anterior front of the calcaneus heel bone to the tendons of the digitorum…. The depressor labii inferioris muscle is a four-sided facial muscle located in the jaw area that draws the lower lip down and to the side. The muscles of the face give it general form and contour, help you outwardly express your feelings, and enable you to chew your food. The quadriceps femoris is a group of muscles located in the front of the thigh.
Weight is distributed between the bottom portions of the two hip bones or ischium and the tailbone, providing balance and stability when a person is seated. The tailbone is the connecting point for many pelvic floor muscles. 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.
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