L8 Pelvic Floor and Walls Flashcards
(22 cards)
Hip bones are connected to each other and the sacrum via?
Pubic Symphysis
Sacroiliac Joints
______________
– Above pelvic inlet
– Between the iliac wing
– Contains GI/GU
Grater (False) Pelvis
____________
– Bony-walled space between pelvic inlet
and pelvic outlet
– Skeletal framework for pelvic cavity
– Bounded inferiorly by pelvic diaphragm (floor)
Lesser (true) pelvis
Boundaries of Pelvic Inlet/Brim?
Ilium (Arcuate Line)
Pubis (Pectineal Line/Pubic Crest)
Sacrum
Boundaries of Pelvic Outlet?
Pubis (Pubic Arch/Subpubic Angle)
Ischia (Ischial Tuberocities)
Sacrum and Coccyx (lateral Margins)
Pelvic Measurements Significant in _________
Obstetrics
Int & ext measurements performed by transvaginal sonography provide info on size/shape of bony boundaries of lesser pelvis (birth canal)
Sexual Dimorphisms in the Pelvis?
Inferior to Pelvic Cavity?
Pelvic floor (diaphragm) suspended above (but descends to level of) pelvic outlet
Role of the Peritoneum
Mucous membrane w/ connective tissue
Secretes: Antibodies/Nutrients
Waste Removal
Allows organs to move
Two recesses of the Female Peritoneum
vesicouterine recess (b/n Bladder and Uterus)
rectouterine recess -aka. Pouch of Douglas (b/n Rectum and Uterus)
What is used to access the ovaries surgically?
Pouch of Douglass
What is essential for the integrituy of the pelvic floor, esp in females?
Perineal Body (central tendon of perineum)
– Rupture during delivery
– Predisposes to prolapse of uterus, rectum, or urinary bladder
Keeps the anal canal and orifice shut?
External anal sphincter
What muscle of the pelvic floor:
supports emptying urethra in the last part of micturition
covers bulb of penis or vestibular bulb
important for erection
ejaculation
orgasm
Bulbospongiosus
What muscle of pelvic floor:
flexes the anus
Stabilize the erect penis and tense the vagina during orgasm
Retards return of blood of veins by pressure on crus penis – important for erection
Ischiocavernosus Muscle
What muscle of the pelvic floor:
Fixation of the perineal body (central tendon of perineum)
support of the pelvic floor
expulsion of semen in males and last drops of urine inboth sexes
Superficial and deep transverse perineal
What muscles converge at the Perineal Body?
External anal sphincter
Bulbospongiosus
Ischiocavernosus
Superficial and deep transverse perineal
Pear shaped, muscle besides glutaeus medius, lateral rotator of hip for walking
Piriformis
Main nerve of perineum & chief sensory nerve of ext genitalia?
Pudendal Nerve
The Pudendal nerve leaves pelvis w/ ______________ artery through ___________ sciatic foramen b/t _______ & _______ muscles, hooks around _______ & ________, enters
perineum through ________ sciatic foramen
The Pudendal nerve leaves pelvis w/ internal pudendal artery through greater sciatic foramen b/t piriformis & coccygeus, hooks around ischial spine & sacrospinous lig, enters
perineum through lesser sciatic foramen
