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Perineal Muscles
Muscular System

Perineal Muscles

Musculi perinei

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The perineal muscles include those that are located inferior to the pelvis and support the pelvic floor and structures of the external genitalia. The perineum itself can be arbitrarily divided into an anteriorly located urogenital triangle and a posteriorly located anal triangle. The line that separates these two triangles is defined by an arbitrary horizontal line that extends between the right and left ischial tuberosities.

For classification purposes, the perineal muscles can also be arbitrarily divided into two distinct groups:

- muscles of the urogenital triangle;

- muscles of the anal triangle.

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The diamond-shaped perineum has the urogenital diaphragm (the triangular layer from the symphysis pubis in the front and then left and right ischial tuberosities, the two bony lumps on which we sit) as its roof and the skin as its floor.

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