Anatomy Flashcards
What does the ASIS offer attachment to?
Inguinal ligamnt
What does the anterior inferior iliac spine offer attachment to?
Rectus femoris muscle
Iliofemoral ligament
What does the ischial spine offer attachment to?
Sacrospinous ligament
What does the ischial tuberosity offer attachment for?
Sacrotuberous ligament
What is the ischial tuberosity?
“Sitting bone”
What does the pubic tubercle offer attachment to?
Inguinal ligament
What does the coccyx offer attachment to?
Levator ani Coccygeus muscle Anococcygeal raphe Glut maximus Anterior and posterior sacrococcygel ligaments
What does the inguinal ligament attach to?
ASIS and pubic tubercle
What does the sacrotuberous ligament attach to?
Sacram and ischial tuberosity
What does the sacrospinous ligament attach to?
Sacram and ischial spine
What do the sacroiliac ligaments attach to?
Sacrum and ilium
What pelvic muscles are present in the urogenital triangle?
Bulbospongiosus
Ischiocavernosus
Superficial transverse perineal
External anal sphincter
What action does the bulbospongiosus perform?
Male- empty urethra
Female- clench vagina
What is the innervation of the bulbospongiosus?
Branch of pudendal
What is the action of the ischiocavernosus?
Assist bulbospongiosus in females
Maintain erection in males
What is the innervation of the ischiocavernosus muscle?
Branch of pudendal
What is the action of the transverse perineals?
Superficial- Fixation of perineal body
Deep- Support pelvic floor, Expulsion of semen
What is the innervation of the deep transverse perineal?
Branch of pudendal
What is the action of the external anal sphincter?
Maintain faecal continence
What is the innervation of the external anal sphincter?
Branch of pudendal
What are the muscles of the pelvic diaphragm?
Puborectalis
Pubococcygeus
Iliococcygeus
Coccygeus
What is the action of the puborectalis?
Maintain faecal continence
What is the innervation of the puborectalis?
Branch of pudendal
What is the action of the pubococcygeus?
Control urine flow and contract during orgasm
What is the innervation of the pubococcygeus?
Branch of pudendal
What is the function of the iliococcygeus?
Elevate pelvic floor
What is the innervation of the iliococcygeus?
Branch of pudendal
What is the function of the Coccygeus?
Pull forward coccyx
What is the innervation of the coccygeus?
Branch of pudendal
What is the function of the piriformis?
Lateral rotator of the thigh
What is the innervation of the piriformis?
Piriformis nerve
What is the function of the obturator internus?
Abduct, laterally rotate and stabilise hip
What is the innervation of the obturator internsu?
Obturator nerve
What muscles make up the levator ani?
Puborectalis
Pubococcygeus
Iliococcygeus
What is the overall function of the levator ani?
Support pelvic floor and form bulk to pelvic diaphragm
What is the blood supply f the levator ani?
Inferior gluteal artery
What is the nerve supply of the levator ani?
Branch of pudendal
What is the perineal body?
Meeting point of several muscles
Found in midline at junction between urogenital and anal triangle
What muscles meet at the perineal body?
External anal sphincter External urinary sphincter Bulbospongiosus Superficial and deep transverse perineal muscles Anterior fibres of levator ani
What is the corpus cavernous?
Erectile tissue forming the bulk of the penis or clitoris
What are the nerve contents of the greater sciatic foramen?
Sciatic nerve Pudendal Superior and inferior gluteal Posterior femoral cutaneous nerve Nerve to quadrates femoris Nerve to obturator internus
What are the vessel contents of the greater sciatic foramen?
Superior gluteal artery and vein
Inferior gluteal artery and vein
Internal pudendal artery and vein
What muscle passes through the greater sciatic foramen?
Piriformis
What are the contents of the lesser sciatic foramen?
Tendon of obturator internus
Nerve to obturator internus
Pudendal nerve
Internal pudendal vessels
What are the contents of the obturator foramen?
Obturator membrane
Obturator canal
What are the contents of the obturator canal?
Obturator nerve
Obturator artery and vein
What are the nerve roots forming the sacral plexus?
L4-S4
What are the main nerves given off by the sacral plexus?
Superior gluteal Inferior gluteal SCiatic Posterior femoral Pudendal
What are the nerve roots of the superior gluteal?
L4-S1
What are the nerve roots of the inferior gluteal?
L5-S2
What are the nerve roots of the sciatic nerve?
L4-S3
What are the nerve roots of the posterior femoral?
S1-S3
What are the nerve roots of the pudendal?
S2-4
What does the sciatic nerve directly supply?
Posterior compartment of thigh
Lateral rotator compartment, except for piriformis and quadratus femoris
What does the superior gluteal nerve supply?
Glut medius
Glut minimus
Tensor fasciae latae
What does the inferior gluteal supply?
Glut maximus
What does the posterior cutaneous femoral nerve supply?
Cutaneous sensation of lower buttocks, upper and medial thigh
What des the pudendal nerve supply?
Penis/clitoris Posterior scrotum/labia Anal canal Muscles of perineum and pelvic floor External anal and urethral sphincters
What are the main branches of the sciatic nerve?
Tibial
Common fibular
What are the main branches of the pudendal nerve?
Inferior rectal
Dorsal nerve of penis/clitoris
Perineal nerve
What are the branches of the internal iliac?
Anterior
Posterior
What are the branches of the anterior iliac?
Obturator Unbulical Inferior vesical Vaginal Uterine Middle rectal Internal pudendal Inferior gluteal
What are the branches of the posterior iliac?
Iliolumbar
Lateral sacral
Superior gluteal
What is the gonadal artery a branch of?
Abdo aorta
What level does the gonadal artery come off at?
L2
Whatare the gondal arteries?
Ovarian
Testicular
What is the medial sacral artery a branch f?
Abdo aorta
What level does the median sacral artery come off at
L4
What does the median sacral artery supply?
Sacrum
Coccyx
What is the superior rectal artery a branch of?
Inferior mesenteric
What does the superior rectal artery supply?
Rectum
What does the obturator artery supply?
Adductor compartment
What does the umbilical artery supply?
Superior aspect of urinary bladder
What does the inferior vesical artery supply?
Lower aspect of urinary bladder
Prostate and seminal vesicles
What does the vaginal artery supply?
Lower aspect of urianry bladder
Vagina
Rectum
What does the uterine artery supply?
Uterus
What does the middle rectal artery supply?
Distal rectum
What does the internal pudendal artery supply?
Perineum
What does the inferior gluteal artery supply?
Gluteal muscles and hip joint
What does the lumbar branch of the iliolumbar artery supply?
Psoas major
Quadratus lumborum
Posterior abdo wall
What does the iliac branch if the iliolumbar artery supply?
Muscles and bone around iliac fossa
What do the lateral sacral arteries supply?
Sacral canal
Skin and muscle posterior to sacrum
What does the superior gluteal artery supply?
Muscles and skin of gluteal region