MS1: Anatomy Review of the Hip

Question 1

what makes up the hip bone

Answer 1

ilium, ischium, pubis

Question 2

what is the largest hip bone

Answer 2

ilium - superior 2/5 of acetabulum

Question 3

what is the smallest hip bone

Answer 3

pubis - anterior 1/5

Question 4

what forms posterior acetabulum

Answer 4

ischium - posterior 2/5

Question 5

what level is the iliac crest

Answer 5

L4

Question 6

what is the level PSIS

Answer 6

S2

Question 7

what is the orientation of the acetabulum

Answer 7

laterally, inferiorly, anteriorly; 20 deg

Question 8

it is the strongest longest bone in the body

Answer 8

femur

Question 9

what is the orientation of the femoral head

Answer 9

anteriorly, superiorly and medially

Question 10

describe the femoral head’s covering

Answer 10

2/3 covered with articular cartilage except sa fovea capitis kase dun dadaan ligamentum teres

Question 11

how does trabecular bone withstand high loads

Answer 11

creates compress and tensile patterns

Question 12

what is ward’s triangle

Answer 12

point of weakness in trabecular patters - femoral neck

common site of fractures - wider in osteoporotic, post-menopausal, elderly

Question 13

action of gluteus maximus

Answer 13

most powerful hip ext and ER; onti knee extensor

Question 14

action of tensor fascia lata

Answer 14

counter acts pull of glut max on ITB

from fascia of abdomen becomes ITB on lateral

Question 15

function of gluteus medius

Answer 15

balance pelvis on single leg stance

Question 16

action of gluteus medius

Answer 16

ant (real) - flex, abd, IR

post - ext and ER; saks

Question 17

action of glut minimus

Answer 17

major IR; abd

pelvic support on single leg

Question 18

what are the actions of piriformis

Answer 18

ER at < 60 deg hip flexion

IR and ab at 90 def flexion

Question 19

piriformis syndrome

Answer 19

impinge of sciatic - common source of buttocks and leg pain

Question 20

what are other hip ER aside from glut max

Answer 20

obturator internus

gemellis

quadratus femoris

Question 21

function of iliopsoas

Answer 21

most powerful hip flex; weak add and ER

trunk flexor when feet stabilized

Question 22

function of pectineus

Answer 22

add, flexor, IR

Question 23

action of sartorius

Answer 23

flex, abd, ER

some knee flex bc pes anserine

Question 24

describe the biceps femoris

Answer 24

only long head acts on hip

most commonly strained

Question 25

function of hamstrings

Answer 25

all ext hip except short head of biceps femoris; works w adductor mag and glut max

Question 26

most powerful adductor

Answer 26

adductor mag - active in all motions except abd

Question 27

describe adductor mag

Answer 27

add portion - obturator

post portion - hamstring - sciatic - extend hip

Question 28

most commonly strained adductor

Answer 28

add longus - bc prominent in resisted add

Question 29

describe gracilis

Answer 29

most superficial and medial; pes anserine so some knee extend

longest hip add

Question 30

what are the other hip add

Answer 30

add long, brev, mag

gracilis