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Yousun Koh

Muscles of the pelvic floor (English)

Muscles of the pelvic floor (English)

The upper image shows the superior view of the pelvic floor, while the lower image demonstrates the inferior view. From the superior view, the levator ani muscle and its three components are visible: the puborectalis (puboanalis), pubococcygeus and iliococcygeus muscles. Extending between the ischial spines and coccyx is the coccygeus muscle. Moving posterosuperiorly, the piriformis muscle forms the posterolateral wall of the pelvic cavity, while the obturator internus muscle forms part of the anterolateral wall of the pelvic cavity.From the inferior view, the muscles of the perineum can be identified. Beginning in the deep perineal space/pouch, there is the deep transverse perineal muscle and external urethral sphincter. Moving inferiorly to the superficial perineal space/pouch, the superficial transverse perineal muscle, bulbospongiosus, and paired ischiocavernosus muscles are found. Finally, heading posteriorly to the anal triangle of the perineum, the external anal sphincter is depicted.
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