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Corpus: Ischiocavernosus muscle

1. Definition

The ischiocavernosus muscle is a skeletal muscle that forms part of the pelvic floor musculature.

3D model of the pelvic floor. The ischiocavernous muscle is labeled with the number 12.

2. Anatomy

2.1. Topography

The ischiocavernosus muscle is situated just below the subcutaneous tissue of the perineum, lateral to the bulbospongiosus muscle, within the superficial perineal pouch.

2.2. Origin

The muscle originates partly tendinously and partly fleshy from the inner surface of the ischial tuberosity, located behind the base of the penile crus. Additional origins are found on both sides of the crus penis, particularly on the ischial ramus and, in some cases, on the inferior pubic ramus.

2.3. Attachment

The muscle fibers run ventrally and medially, ending in an aponeurosis at the corpus cavernosum of the penis.

3. Innervation

The ischiocavernosus muscle is innervated by the perineal branches of the pudendal nerve, which originate from the sacral plexus (S2-S4).

4. Arterial supply

The arterial supply to the muscle is provided by the perineal artery.

5. Function

The ischiocavernosus muscle functions to compress the crus penis (or the corresponding structure in females, the crus clitoridis), aiding in the maintenance of erection by restricting venous outflow from the erectile tissues.

Stichworte: Corpus, Muscle, Pelvis

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Isabel Keller
DocCheck Team
Natascha van den Höfel
DocCheck Team
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Letzter Edit:
21.08.2024, 07:58
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Nutzung: BY-NC-SA
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