Coccygeus muscle

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The coccygeus muscle (also known as the ischiococcygeus) is a muscle of the pelvic floor. It is part of the levator ani group of muscles and plays a role in supporting the pelvic viscera.

Anatomy

The coccygeus muscle originates from the ischial spine and inserts into the lateral margins of the lower sacrum and upper coccyx. It is situated posterior to the levator ani muscle and is often considered part of the pelvic diaphragm.

Innervation

The coccygeus muscle is innervated by the anterior rami of the S4 and S5 spinal nerves.

Blood Supply

The muscle receives its blood supply from the inferior gluteal artery.

Function

The primary function of the coccygeus muscle is to support the pelvic viscera. It also helps to stabilize the sacroiliac joint and may assist in flexing the coccyx.

Clinical Significance

Weakness or dysfunction of the coccygeus muscle can contribute to conditions such as pelvic organ prolapse and coccygodynia (pain in the coccyx region). Strengthening exercises for the pelvic floor muscles, including the coccygeus, are often recommended for individuals with these conditions.

See Also

• Pelvic floor
• Levator ani
• Pelvic diaphragm
• Coccyx
• Sacrum