Internal Iliac Artery, Pelvis, and Pelvic Diaphragm Flashcards
Cooper’s ligament crosses over the
Superior pubic ramus
Passageways out of the pelvis
Obturator foramen
Greater sciatic foramen
Lesser sciatic foramen
Obutrator foramen leads out of ___ to ___
Out of true pelvis to the medial thigh
Greater sciatic foramen leads out of ___ to ___
Out of the pelvis to the deep gluteal region/ischioanal fossa
Lesser sciatic foramen leads out of ___ to ___
Gluteal region to pudendum/perineum
What ligament(s) creates the greater sciatic foramen
Sacrospinous ligament
What ligament(s) create the lacuna musculorm and lacuna vasorum?
Inguinal ligament and iliopectineal arch
What ligament(s) create the lesser sciatic foramen?
Sacrospinous ligament and sacrotuberous ligament
What ligament creates the obturator membrane?
Sacrotuberous ligament
Sacrotuberous ligament connects
Sacrum to tuberosity of ishium
Sacrospinous ligament connects
Sacrum to ishial spine
Muscles of the pelvic diaphrgam
Obutrator internus
Coccygeus
Piriformis
Puborectalis
Pubococcygeus
Iliococcygeus
Levator ani consists of
Puborectalis
Pubococcygeus
Iliococcygeus
Sympathetic innervation to the pelvis muscles- function
Stop movement by causing sphincters to contract
Sympathetic innervation to pelvis is carried by
Sacral splanchnic nerves
Functions of afferents that accompany the sympathetics of the pelvis
Register stretch sensation superior to the pelvic pain line
Parasympathetic innervation to pelvis muscles- function
Propel by organ wall contraction and sphincter relaxation
Parasympathetic innervation to pelvis is carried by
Pelvic splanchinic nerves
Functions of afferents that accompany parasympathetics of the pelvis
Unconscious reflexes
Pain below the pelvic pain line travel retrograde with parasympathetics
Lumbosacral trunk extends from
L4-S4
Ventral rami of lumbosacral trunk include
S1-S4
Pelvic splanchinics are
S2-S4
Sacral splanchinics come off
Sympathetic chain
Pelvic splanchinics come off
Ventral rami
Piriformis and obturator internus are both
Lateral rotators
Puborectalis- origin
Posterior face of medial pubis
Puborectalis- insertion
Onto itself, wrapping around rectum
Puborectalis- innervation
S2-S4
nerve to levator ani muscles
Puborectalis- action
Supports rectum
Assists anal sphincters to prevent fecal incontinence
Pubococcygeus- origin
Posterior face of medial pubis
Tendinous arch
Pubococcygeous- insertion
Anterior face of coccyx and sacrum
Pubococcygeous- innervation
S2-S4
Nerve to levator ani muscles
Pubococcygeous- action
Supports pelvic organs
Helps control flow of urine
Contracts during orgasm
Illiococcygeous- origin
Tendous arch
Ischial spine
Illiococcygeous- insertion
Lateral face of coccyx
Anococcygeal ligament/raphe
Innervation of illiococcygeous
S2-S4
nerve to levator ani
Function of illiococcygeous
Supports pelvic organs
Ischiococcygeous- origin
Ischial spine
Sacrospinous ligament
Ischiococcygeous- insertion
Lateral face of coccyx
Adjacent border of sacrum
Ischiococcygeous- innervation
S3-S5
Ischiococcygeous- action
Supports pelvic organs
Pulls coccyx forward after defecation
Branches of the external iliac
Inferior epigastric
Deep circumflex iliac artery
Superficial circumflex iliac artery
Superficial epigastric
External pudendal arteries (superficial and deep)
Then it becomes the femoral artery
Inferior epigastric artery supplies
Abdominal wall muscles
Deep circumflex iliac artery supplies
Iliacus
Abdominal wall muscles
Superficial circumflex iliac artery supplies
Superficial structures of anterior hip
Superficial epigastric artery ascends between
Camper’s and scarpa’s fascia
Superficial epigastric artery supplies
Superficial structures of lower abdomen
Posterior trunk of internal iliac includes
Iliolumbar artery
Lateral sacral
Superior gluteal
Anterior trunk of internal iliac includes
Inferior gluteal
Internal pudendal
Inferior vesicle (Vaginal artery in females)
Middle rectal
Artery to the vas deferens (Uterine artery in females)
Superior vesicle
Obturator
Obliterated umbilical
Iliolumbar artery supplies
Iliopsoas
Quadratus lumborum
Spinal branch of cauda equina
Lateral sacral artery supplies
Sacrum/sacral canal
Superior gluteal artery supplies
Gluteus minimus and gluteus medius
Piriformis
Tensor fascia lata
Inferior gluteal artery supplies
Gluteus maximus
Posterior thigh
Superior portion of hamstring muscles
Internal pudendal artery supplies
Perineum
Anus
External genitalia
Which internal iliac arteries go to the back body wall
Iliolumbar
Lateral sacral
Which internal iliac arteries leave the pelvis entirely
Obturator- leaves anteriorly
Leave posterioly:
Superior gluteal
Inferior gluteal
Internal pudendal
Which internal iliac arteries go to the pelvic viscera?
Superior vesical
Middle rectal
Inferior vesical/artery to ductus deferens (males)
Vaginal/uterine (females)