Dissection of female pelvis from a lateral approach

Pubis, ischium and external genitalia, close-up view of right lateral aspect

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Image #158-3

Dissection of female pelvis from a lateral approach Pubis, ischium and external genitalia, close-up view of right lateral aspect The lower portion of the dissection shown in the preceding view is displayed in this close-up photograph. The superficial fascia of the perineum has been dissected. The membranous layer of the fascia (25) consists in part of a fan-like series of fibrous bands which radiate into the labium majus from a bony attachment along the inferior ramus of the pubic bone. 1 . Acetabulum 2 . Ligamentum teres femoris (cut off) 3 . Ligamentum transversum of acetabulum 4 . Posterior branch of obturator artery 5 . Obturator internus muscle (cut off) 6 . Gluteus maximus muscle 7 . Sciatic nerve 8 . Sacrotuberous ligament 9 . Ischial tuberosity (tendons of hamstring muscles divided close to bone) 10 . Coccyx (covered by ligaments) 11 . Ramus of ischium 12 . Branch of inferior rectal artery 13 . External anal sphincter muscle (covered with fascia) 14 . Femoral vein 15 . Anterior branch of obturator nerve 16 . Superior pubic ramus 17 . Posterior branch of obturator nerve 18 . Pubic tubercle (covered by fibers of inguinal ligament) 19 . Anterior branch of obturator artery 20 . Body of pubic bone 21 . Obturator membrane (obturator internus muscle visible through membrane) 22 . Location of pubic symphysis 23 . Inferior pubic ramus 24 . Origin of gracilis muscle (cut off) 25 . Superficial perineal fascia (membranous layer or Colles' fascia; note the radiating fibers firmly attached to the inferior ramus of pubis) 26 . Labium majus 27 . Labium minus (redundant)