Coccygeus muscle

Coccygeus muscle is a small, triangular muscle, which, together with the levator ani, forms the pelvic diaphragm. It is located posterior to the levator ani and is also known as the musculus coccygeus in Latin.

Etymology

The term "coccygeus" is derived from the Greek word "kokkyx", which means "cuckoo". It was named so because the coccyx bone, to which the coccygeus muscle is attached, resembles the beak of a cuckoo bird.

Anatomy

The coccygeus muscle extends from the ischial spine to the sacrum and coccyx. It forms the posterior part of the pelvic diaphragm. The muscle is innervated by the S4 and S5 nerves.

Function

The coccygeus muscle supports the pelvic organs and helps to resist increases in intra-abdominal pressure. It is also involved in the movement of the coccyx.

Clinical significance

Damage to the coccygeus muscle can result in coccydynia, a type of lower back pain. This condition can be caused by childbirth, falls, or prolonged sitting.

Related terms

• Pelvic diaphragm
• Levator ani
• Ischial spine
• Sacrum
• Coccyx
• S4 nerve
• S5 nerve
• Coccydynia

Coccygeus muscle Resources
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