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Laboratory 42. The Male Perineum and the Penis
Step 9. Boundaries of the Male Perineum

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Note: Before beginning this part of dissection exercise, place the cadaver in the lithotomy position.

Identify the boundaries of the diamond-shaped perineum :
  • Anterior border is the inferior margin of the pubic symphysis.
  • Posterior boundary is the coccyx
  • Laterally, the perineum is bounded by the two ischial tuberosities
  • Posterolateral border of the perineum is formed by the sacrotuberous ligaments, which are covered by the gluteus maximus muscle.
  • Anterolaterally, the diamond-shaped region is completed by the ischiopubic rami.

Links and References:
Grant's: 3.59
Netter: 258
Rohen/Yokochi: 328