MS1: Anatomy Review of the Hip Flashcards
what makes up the hip bone
ilium, ischium, pubis
what is the largest hip bone
ilium - superior 2/5 of acetabulum
what is the smallest hip bone
pubis - anterior 1/5
what forms posterior acetabulum
ischium - posterior 2/5
what level is the iliac crest
L4
what is the level PSIS
S2
what is the orientation of the acetabulum
laterally, inferiorly, anteriorly; 20 deg
it is the strongest longest bone in the body
femur
what is the orientation of the femoral head
anteriorly, superiorly and medially
describe the femoral head’s covering
2/3 covered with articular cartilage except sa fovea capitis kase dun dadaan ligamentum teres
how does trabecular bone withstand high loads
creates compress and tensile patterns
what is ward’s triangle
point of weakness in trabecular patters - femoral neck
common site of fractures - wider in osteoporotic, post-menopausal, elderly
action of gluteus maximus
most powerful hip ext and ER; onti knee extensor
action of tensor fascia lata
counter acts pull of glut max on ITB
from fascia of abdomen becomes ITB on lateral
function of gluteus medius
balance pelvis on single leg stance
action of gluteus medius
ant (real) - flex, abd, IR
post - ext and ER; saks
action of glut minimus
major IR; abd
pelvic support on single leg
what are the actions of piriformis
ER at < 60 deg hip flexion
IR and ab at 90 def flexion
piriformis syndrome
impinge of sciatic - common source of buttocks and leg pain
what are other hip ER aside from glut max
obturator internus
gemellis
quadratus femoris
function of iliopsoas
most powerful hip flex; weak add and ER
trunk flexor when feet stabilized
function of pectineus
add, flexor, IR
action of sartorius
flex, abd, ER
some knee flex bc pes anserine
describe the biceps femoris
only long head acts on hip
most commonly strained
function of hamstrings
all ext hip except short head of biceps femoris; works w adductor mag and glut max
most powerful adductor
adductor mag - active in all motions except abd
describe adductor mag
add portion - obturator
post portion - hamstring - sciatic - extend hip
most commonly strained adductor
add longus - bc prominent in resisted add
describe gracilis
most superficial and medial; pes anserine so some knee extend
longest hip add
what are the other hip add
add long, brev, mag
gracilis
