Anatomy Of The Pelvic Region Flashcards
Bones of pelvis made of?
Two innominate form from ilium, ischium and pubis
Pubic symphysis is ?
Fibrocartilaginous disc, wider in females
Sacroiliac joint is?
Secondary cartilaginous joint
Anything above ala is known as?
False pelvis
Outlet of pelvis is made of?
Coccyx, pubic arch, ishcial tuberoisty and sacrotuberous ligament
Open book fracture?
Pubic symphysis completely broken apart
Obturator internus action?
Rotates thigh laterally
Piriformis action?
Rotates thigh laterally and abducts
Pelvic diaphragm made of?
Coccygeus and levator ani muscle
Levator ani formed from?
Puborectalis (allows defecation when relaxes)
Pubococcygeus
Iliococcygeus
Innervation to levator ani?
S4
Levator ani help?
Maintain intraabdominal pressure, help in labour and defecation
Gonadal veins drain back into?
IVC or left renal vein
Pudendal nerve transverses through?
Greater and lesser foramen
Pudendal nerve gives rise to the?
Inferior rectal, posterior scrotal and labial branches and dorsal nerve to penis/clitoris and perineal branches
Pain line?
Anything above felt in abdomen and anything below felt in pelvis
Sacrum is formed from?
Fusion of 5 sacral vertebrae
Coccyx is formed from?
Fusion of 4 coccygeal vertebrae
Pelvic inlet is formed from?
Promontory and ala, right and left line terminalis
terminalis is made of arcuate line, pecten pubis and pubic crest
Lesser pelvis contains?
Reproductive, urinary and gastrointestinal organs
Obturator foramen is closed by obturator membrane except to allow passage to?
Obturator nerve, artery and vein
Piriform attaches to?
Posterior pelvic walls
Sacral plexus nerves?
Sciatic nerve
Pudendal nerve
Superior gluteal and inferior gluteal
Sacrum is formed by how many vertebrae?
5
Coccyx was formed by how many vertebra?
4
Pelvic brim is made of?
Promontory and ala of sacrum, and then Linda terminals which consists of (pubic crest, pecten pubis, and accurate line)
Sciatic Foramen is formed by?
Sacrotuberous and sacrospinous ligament
What is pelvic floor made of?
Occygeus and lavatory ani muscles
What is posterior wall of pelvic cavity made of?
Piriformis muscle and sacral plexus and sacrum
What is lateral wall of pelvis made of?
Right and left hip bones obturator internus muscle and obturator fascia
Main artery supplying pelvis?
Internal iliac artery
Gonadal artery comes from?
Abdominal aorta
Posterior division of internal iliac artery splits into?
Iliolumbar
Lateral sacral
Superior gluteal
Anterior division of internal iliac artery?
Umbilical artery then obturator artery and superior Vesical artery
Inferior vesical artery (supplying prostate)
Middle rectal artery
Pudendal
Inferior gluteal
In females there is an extra uterine artery present and inferior vesical artery becomes vaginal artery
Ovarian artery comes from?
Aorta
Median sacral artery comes from?
Abdominal aorta
Superior rectal artery comes from?
Inferior mesenteric
Somatic plexuses in pelvis includes?
l4 to Co
Sacral pelvis includes?
Sciatic nerve (leg and foot)
Pudendal nerve
Superior gluteal nerve
Inferior gluteal nerve
Parasympathetic supply?
Pelvic splanchnic nerves s2-s4
Sympathetic flow supply?
Superior and inferior hypogastric plexuses
And sacral sympathetic trunk
What does the pudendal nerve supply?
inferior rectal, perineal branches, posterior scrotal/labia branches and dorsal nerve to the penis/clitoris.
Parasympathetic flow is through?
Pelvic splanchnic nerves S2-4
Sympathetic flow?
Sacral sympathetic trunk
Superior and inferior hypogastric plexuses
