Please enable JavaScript.

Coggle requires JavaScript to display documents.

Pelvis & Perineum Muscles (Perineum (Ischiocavernosus (Movement…

- - - - Action: Maintain erection & pushes blood into genital
      - Innervation: Muscular (deep) branch of perineal nerve, a branch of pudendal nerve ( S2-S4)
    - - Origin: Internal surface of ischiopubic ramus & ischial tuberosity
      - Insertion: Crus- inferior/medial aspects & membrane
  - - - Innervation: Muscular (deep) branch of perineal nerve, a branch of pudendal nerve ( S2-S4)
      - Action: support & fixes perineal body/pelvic floor to support abdominal pelvic viscera; resist increase in intra-abdominal pressure
    - - Insertion: posterior border of perineal membrane
      - Origin: Internal surface of ischiopubic ramus & ischial tuberosity
  - - - Innervation: Muscular (deep) branch of perineal nerve, a branch of pudendal nerve ( S2-S4)
      - Action: support & fixes perineal body/pelvic floor; assists in erection (male & female)
    - - Origin: perineal body
      - Insertion: perineal membrane (male); pubic arch & fascia of corpora cavernosa of clitoris (female)
  - - - Innervation: Muscular (deep) branch of perineal nerve, a branch of pudendal nerve ( S2-S4)
      - Action: support & fixes perineal body/pelvic floor to support abdominal pelvic viscera; resist increase in intra-abdominal pressure
    - - Origin: Internal surface of ischiopubic ramus & ischial tuberosity
      - Insertion: perineal body & external anal sphincter
  - - - Action: constricts anal canal
      - Innervation: Inferior anal (rectal) nerve, a branch of pudendal nerve (S2-S4)
    - - Origin: skin and fascia surrounding ans
      - Insertion: perineal body
  - - - Action: Compress urethra; also in females- compress vagina
      - Innervation: Dorsal nerve of penis or clitoris, terminal branch of pudendal nerve (S2-S4)
    - - Origin: Around urethra (compressor urthera portion only)
      - Insertion: surrounds urethra superior to perineal membrane
- - - - Movement
        
        Innervation: Branches of S4 & S5 spinal nerves
      - Attachments
        
        Origin: Ischial spine
        
        Insertion: Inferior end of sacrum & coccyx
    - - Movement
        
        Action: Resist increase in intra-abdominal pressure & support pelvic visera
        
        Innervation: Nerve to levator ani (branches of S4), inferior anal (rectal) nerve, coccygeal plexus
      - Attachments
        
        Origin: pubis (body); tendinous arch of obturator fascia; ischial spine
        
        Insertion: perineal body; coccyx; walls of prostate or vagina rectum, & anal canal
  - - - Movement
        
        Action: Thigh external rotate
        
        Innervation: Nerve to obturator internus (L5, S1, S2)
      - Attachments
        
        Origin: Pelvic surface (ilium & ishium), obturator membrane
        
        Insertion: Greater trochanter (femur)
    - - Movement
        
        Action: Thigh external rotate & ABDuct
        
        Innervation: anterior rami of S1 & S2
      - Attachments
        
        Origin: pelvic surface (S2-S4); superior margin of greater sciatic notch & sacrotuberous ligament
        
        Insertion: Greater trochanter (femur)