pelvis & hip Flashcards
origin of rectus femoris (direct head) and iliofemoral ligament?
AIIS (antero-inferior iliac spine)
origin of sartorius, transverse/internal abdominal muscles?
ASIS
ANTEversion and orientation of acetabulum?
15degrees anteverted, 45degrees caudally oriented
average ANTEversion of femoral neck (in relation to femoral condyles)?
14degrees (or 1-40degrees) anteverted
hip joint CAPSULE coverage?
extends ANTERIORLY across femoral neck to trochanteric CREST, POSTERIORLY only partially across NECK
average femoral neck-shaft angle?
127degrees (*141degrees in fetus)
number of ANTERIOR LIGAMENTS in hip joint?
3
STRONGEST (anterior hip joint) ligament in the body?
ILIOfemoral ligament (Y ligament of Bigelow)
2 other anterior hip ligaments?
ISCHIOfemoral, PUBOfemoral
age-dependent blood supply to femoral head?
0-4YRS: deep femoral - medial, lateral cx arteries
4-ADULT: medfem cx - postsup, postinf retinacular arteries
ADULT: med cx - lateral epiphyseal artery
why antegrade femoral nailing undesirable for pedia?
possible damage to posterosuperior retinacular vessels (4yrs-adult)
why posterior acetabular approach undesirable for adult?
might transect quadratus femoris, damage medial circumflex
separates greater and lesser sciatic foramina?
SACROSPINOUS ligament
importance of greater sciatic foramen?
piriformis, sciatic nerve
importance of lesser sciatic foramen?
short external rotators (sup/inf gemelli, obturator internus)
most common nerve injured in total hip replacement?
sciatic nerve (PERONEAL division - “postaxial” - innervates biceps femoris)
MAJOR LANDMARK for hip structures?
PIRIFORMIS muscle: superior gluteal nerve/artery exits above, all else below
2 nerves that exit greater sciatic foramen, enter lesser foramen?
pudendal, nerve to obturator internus
borders of femoral triangle?
sartorius, pectineus, inguinal ligament
structures in femoral triangle (lateral to medial)?
“NAVaL”: femoral Nerve, Artery, Vein, and Lymphatics
level aorta branches off into common iliac arteries?
L4
level common iliac artery divides into internal, external iliac?
S1
femoral artery branches off from?
aorta - common iliac - external iliac - femoral artery
branches of (common) femoral artery?
superficial femoral, deep femoral, medial circumflex
major blood supply to femoral head?
medial femoral circumflex (from femoral artery), lateral epiphyseal
other name for adductor canal?
Hunter’s canal
safe zones for placement of acetabular screws?
postero-superior, postero-inferior
important areas of femoral ossification?
head, distal femur
important blood supply of femoral head from 0-4years?
ligamentum teres (from obturator artery)
important areas of femoral ossification?
head, distal femur
important blood supply of femoral head from 0-4years?
ligamentum teres (from obturator artery)
