Pelvis & Pelvic Viscera Flashcards
branch of lumbar plexus that supplies the hip flexors and extensors of knee
femoral nerve
branch of lumbar plexus that supplies the adductors of the thigh
obturator nerve
branch of lumbar plexus that divides into genital and femoral branches
genitofemoral nerve
branch of lumbar plexus that supplies skin to suprapubic and inguinal regions + motor supply to abdominals
ilioinguinal and iliohypogastric nerves
provides cutaneous nerve supply to anterior and lateral thigh
lateral femoral cutaneous nerve
makes up the floor of the pelvis
levator ani + coccygeus
what forms the bony pelvis
right hip bone
left hip bone
sacrum
coccyx
location of true pelvis (pelvic minor)
between pelvic inlet and pelvic outlet
location of pelvic viscera
true pelvis
pelvic viscera
urinary bladder reproductive organs (uterus, ovaries)
separates false pelvis from true pelvis
pelvic inlet
3 parts of a hip bone
ilium
ischium
pubis
formed by junction of 3 hip bones
acetabulum
formed by rami of pubis and ischium
obturator foramen
where do obturator nerve and vessels pass through the pelvis
obturator foramen
male or female pelvis? shallow false pelvis oval pelvic inlet wide, shallow true pelvis wide, rounded pubic arch oval or triangular obturator foramen
female
male or female pelvis? deep false pelvis heart-shaped pelvic inlet narrow, tall true pelvis narrow pubic arch round obturator foramen
male
plane of the pelvic inlet forms a ___ degree angle from the horizontal plane
60
plane of pelvic outlet is _____ degrees with horizontal
10
articulation of L5 and S1 vertebrae
lumbosacral joint
connects ilia and L5 vertebrae transverse process
iliolumbar ligament
bony components of sacroiliac joints
iliac bone and sacrum
movement of SI joint
slight gliding and rotation
what type of joint is the pubic symphysis
fibrocartilaginous
ligament that connects superior pubic bodies and R/L pubic tubercles
superior pubic ligament
muscle of the lateral pelvic wall
obturator internus
attachments of the obturator internus
proximal: ischium, ilium, obturator membrane
distal: greater trochanter
what nerve innervates the obturator internus
nerve to obturator internus
action of obturator internus
external rotation of femur
stabilize head of femur
parts of the posterior pelvic wall
sacrum
coccyx
adjacent parts of ilia
SI joints and their ligaments
muscle of the posterior pelvic wall
piriformis
attachments of piriformis
proximal: pelvic surface of 2nd and 4th sacral segments, greater sciatic notch, sacrotuberous ligament
distal: greater trochanter
innervation of piriformis
ventral rami of S1-2
action of piriformis
external rotation, abduction of femur, stabilize head of femur
muscle that is a myofascial trigger point and potential site for entrapment of sciatic nerve
piriformis
muscles of pelvic diaphragm
levator ani (3 muscles) coccygeus
function of levator ani
support pelvic viscera
resist intraabdominal pressure
plays a role in continence
attachments of coccygeus
ischial spine to coccyx and lower sacrum
forms lumbar plexus
ventral primary rami of L1-L4
roots of lumbar plexus split into anterior and posterior divisions within what muscle
psoas major
terminal branches of the lumbar plexus
femoral nerve obturator nerve genitofemoral nerve ilioinguinal and iliohypogastric nerves lateral femoral cutaneous nerve branch to lumbosacral trunk
nerve that supplies hip flexors and extensors of knee
femoral nerve
position of femoral nerve in relation to blood vessels as it enters the thigh deep to inguinal ligament
lateral
NAVEL
nerve that supplies adductors of the thigh
obturator
nerve that supplies skin to suprapubic and inguinal regions + motor supply to abdominals
ilioinguinal and iliohypogastric nerves
nerve that provides cutaneous supply to anterior and lateral thigh
lateral femoral cutaneous nerve
function of lumbosacral trunk
contributes to formation of sacral plexus
what forms the sacral plexus
lumbosacral trunk (L4-L5) and ventral primary rami of S1-S4
supplies musculature and skin of buttocks, posterior compartment of thigh, and entire leg and foot below the knee
sacral plexus
motor supply to gluteus minimus and medius, tensor of fascia lata
superior gluteal nerve
motor supply to gluteus maximus
inferior gluteal nerve
major nerve of perineum
pudendal nerve
posterior division branches of sacral plexus
superior gluteal nerve
inferior gluteal nerve
anterior division branches of sacral plexus
pudendal nerve
branches from both anterior and superior divisions of sacral plexus
sciatic nerve
supplies muscles of perineum, skin of perineum region, and external genitalia
pudendal nerve
2 nerves that make up sciatic nerve
common fibular nerve
tibial nerve
branches of external iliac artery
inferior epigastric
deep circumflex
where does the external iliac artery exit the pelvis
passes through false pelvis only
exits deep to inguinal ligament and becomes femoral artery
posterior division of internal iliac artery
superior gluteal artery
anterior division branches of internal iliac artery
internal pudendal artery obturator artery inferior gluteal artery ovarian artery testicular artery
drains most of pelvis into IVC
internal iliac vein
artery that supplies piriformis, 3 gluteal muscles, and tensor fascia lata
superior gluteal artery
