Module 7 Flashcards
What are the 4 primary layers of pelvic floor?
- Anal sphincter
- Superficial genital muscles
- Perineal membrane
- Pelvic diaphragm
Components of the anal sphincter layer
- internal anal sphincter (smooth)
- external anal sphincter (skeletal)
What are the superficial genital muscles?
- bulbocavernosus
- ischiocavernosus
- superficial transverse perineal
What are the component muscles of the perineal membrane?
- urethrovaginal sphincter
- compressor urethrae
- sphincter urethrae
What are the component muscles of the pelvic diaphragm?
Levator ani
- coccygeus
- iliococcygeus
- puborectalis
- pubococcygeus
What are the 3 s’s of pelvic floor dysfunction?
- Trunk support
- Sphincteric function
- Sexual function
How do the layers of the pelvic floor contribute to trunk support?
- PFM and TrA co-contract = enhanced trunk stability
- extensive fascia, ligamentous support
- increased tone with increased IAP
How do the layers of the pelvic floor contribute to sphincteric function?
Closure of urethra and rectum for continence
How do the layers of the pelvic floor contribute to sexual function?
- proprioceptive sensation
- PFM hypertrophy » smaller vagina » more friction » increased stimulation of nerve fibers
- achieve and maintain erection
These fibers provide quick closure of sphincter muscles
Phasic fast twitch
These fibers provide closure of sphincter muscles during rest
Slow twitch fibers
Normal pelvic organ support is achieved by this from above
Ligamentous stability
Normal pelvic organ support is achieved by this from below
PFM function
Preservation of continence: innervation of bladder/sphincters
Sympathetic innervation
Preservation of continence: storage
Bladder stores urine by expanding