Lecture: muscles of the pelvic floor and perineum

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julianne.elizabeth
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144494
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Lecture: muscles of the pelvic floor and perineum
Updated:
2012-03-28 22:02:40
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pelvic floor perineum
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the pelvic floor and perineum
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  1. Name the muscles of Pelvic floor/diaphram
    What are the function of the pelvic floor?
    Composed of: Levator Ani, Coccygeus

    • Functions:
    • 1. Seals the inferior outlet of the pelvis
    • 2, supports pelvic organs
    • 3. lifts pelvix floor to help release feces
    • 4. Resists increased intra-abdominal pressure
  2. Levator Ani
    Muscles of the pelvic floor
    origin: extensive liear origin inside pelcis from pubis to ischial spine

    Insertion: inner surface of coccyx, levator ani or opposite side, and in part into the structures that penetrate it

    • Action: supports and maintains position of pelvic viscera (resists downward thrust), lifts the anam canal during pooping
  3. Coccygeus
    Muscles of the pelvic floor
    origin: spine of ischium

    insertion: sacrum and coccyx

    • action: supports pelvic viscera
  4. Deep Transverse Perineal Muscle
    Muscles of the Urogenital Diaphram
    Origin: ischial rami

    Insertion: midline central tendon of perineum; some fibers into vaginal wall in femals

    • Action: supports pelvic organs
  5. External Urethral Sphincter
    Muscles of the Urogenital Diaphram
    Origin: isciopubuc rami

    Insertion: midline raphe

    • Action: constricts urethra
  6. Ischiocavernosus
    Muscles of the SUPERFICIAL Perineal Space
    origin: ischial tuberosities

    insertion: crus of the corpova cavernose of main penis or female clitoris

    • action: retards venous drainage and maintains erection of the penis or clitoris
  7. Bulbospongiosus
    Muscles of the SUPERFICIAL Perineal Space
    Origin: central tendon of perineum and midline raphe of penis

    Insertion: anteriorly into coropora cavernosa of penis or clitoris

    • action: empties maile urethra; assists in errection of penis or clitoris
  8. Superficial Transverse perioneal muscles
    Muscles of the SUPERFICIAL Perineal Space
    Origin: ischial tuberosity

    Insertion: central tendon of perineum

    • action: stabilizes and strengthens midline tendon of perineum

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