Coccygeus

A muscle located at the base of the pelvic floor, contributing to pelvic support.

The coccygeus is a small, triangular muscle situated at the back part of the pelvic cavity, extending from the ischial spine of the pelvis to the coccyx. This muscle is part of the pelvic diaphragm, which plays a critical role in supporting the pelvic organs. It combines with other muscles to form a functional unit that helps maintain the stability of the pelvic area.

Terminologia Anatomica

musculus coccygeus

System

Musculoskeletal system

Function

The primary function of the coccygeus muscle is to support the pelvic organs, including the bladder, uterus (in females), and rectum, contributing to overall pelvic stability. During activities that require the contraction of the pelvic floor, such as coughing, sneezing, or lifting, the coccygeus assists in maintaining intra-abdominal pressure that protects these organs. Moreover, it aids in the flexion of the coccyx, allowing for slight movements that accommodate various positions of the body. This muscle also plays a role in the posture of the trunk, supporting the connection between the spine and the pelvis, which is essential for proper balance and locomotion.

Location

The coccygeus muscle is situated posteriorly in the pelvic region, originating from the ischial spine and inserting into the lateral aspect of the coccyx and the lower part of the sacrum. It is positioned the level of the buttocks, lying deep to the gluteal muscles. As part of the pelvic diaphragm, it complements the position of neighboring structures like the levator ani muscle, forming a supportive barrier for the pelvic contents. The coccygeus is primarily oriented in a forward and upward direction, which provides it with an optimal position to support the pelvic structures effectively.

Did You Know?

The coccygeus muscle helps prevent pelvic organ prolapse by maintaining support for the organs.
Despite its small size, this muscle plays an integral role in core stability and posture.
Pain in the coccygeus area, known as coccydynia, can arise from trauma or prolonged pressure on the coccyx.