Iliococcygeus muscle
Musculus iliococcygeus
- Related terms: Iliococcygeus; Levator ani (Iliococcygeus); Iliococcygeus (Levator ani)
Definition
Origin: Ischial spine and from the posterior part of the tendinous arch of the pelvic fascia
Insertion: Coccyx and anococcygeal raphe
Nerve: Levator ani nerve (S4) - inferior rectal nerve from pudendal nerve (S3, S4) - coccygeal plexus
Action: Supports the viscera in pelvic cavity
Description:
The Iliococcygeus arises from the ischial spine and from the posterior part of the tendinous arch of the pelvic fascia, and is attached to the coccyx and anococcygeal raphé; it is usually thin, and may fail entirely, or be largely replaced by fibrous tissue. An accessory slip at its posterior part is sometimes named the Iliosacralis.
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