Thigh & Pelvis

Question 0

Iliacus

Answer 0

O: iliac fossa
I: lesser trochanter
A: flex femur
N: femoral n.

Question 1

Psoas Major

Answer 1

O: bodies, TVP’s of T12-L5
I: lesser trochanter of femur
A: laterally flex vertebral column, flex femur at hip
N: L1-4

Question 2

Psoas Minor

Answer 2

O: bodies of T12-L1
I: pectineal line of the pubis
A: weak flexor of the lumbar spine
N: L1

Question 3

Gluteus maximus

Answer 3

O: iliac crest & sacrum/coccyx
I: gluteal tuberosity & iliotibial tract
A: extend, laterally rotate femur (bursae are located between gluteus max and ischial tuberosity & greater trochanter)
N: inferior gluteal n. (L5, S1, S2

Question 4

Gluteus medius

Answer 4

O: dorsal ilium
I: greater trochanter
A: abduct, medially rotate femur; during gait, supports body on one leg while other leg swings forward
N: superior gluteal n. (L5, S1)

Question 5

Gluteus minimus

Answer 5

O: dorsal ilium
I: greater trochanter
A: abduct, medially rotate femur; assists gluteus medius in supporting the body during gait
N: superior gluteal n. (L5, S1)

Question 6

Tensor fascia lata

Answer 6

O: Anterior superior iliac spine (ASIS), anterior iliac crest
I: iliotibial tract–> lateral condyle of tibia
A: abduct, medially rotate, flex femur; keep knee extended
N: superior gluteal n. (L4, L5)

Question 7

Obturator internus

Answer 7

O: obturator membrane
I: greater trochanter (90 degrees around lesser sciatic notch)
A: laterally rotate femur
N: nerve to obturator internus (L5, S1)

Question 8

Superior & inferior gemelli

Answer 8

O: ischium
I: greater trochanter
A: laterally rotate femur
N: nerves to obturator internus & quadratus femoris (L5, S1)

Question 9

Quadratus femoris

Answer 9

O: ischial tuberosity
I: quadrate tubercle
A: laterally rotate femur
N: nerve to quadratus femoris (L5, S1)

Question 10

Obturator externus

Answer 10

O: obturator membrane (outer)
I: greater trochanter
A: laterally rotates femur
N: obturator n. (L3, L4)

Question 11

Piriformis

Answer 11

O: anterior sacrum
I: greater trochanter
A: abduct, laterally rotate femur
N: S1, S2

Question 12

Sartorius

Answer 12

O: ASIS
I: medial surface upper tibia (pes anserine)
A: flex thigh (hip), laterally rotate femur; flex leg (knee)
N: femoral n. (L2, L3)

Question 13

Quadriceps femoris

Answer 13

O: rectus femoris: AIIS
vastus lateralis: linea aspera
vastus medialis: linea aspera
vastus intermedius: upper anterior femur
I: tibial tuberosity via patella
A: extend leg (knee); flex femur (rectus femoris)
N: femoral n. (L2, L3, L4)

Question 14

Pectineus

Answer 14

O: pubis
I: linea aspera
A: adduct, flex femur
N: femoral n.

Question 15

Adductor longus + adductor brevis

Answer 15

O: pubis
I: linea aspera
A: adduct, flex femur
N: obturator n.

Question 16

Gracilis

Answer 16

O: pubis
I: medial upper tibia (pes anserine)
A: adduct femur; flex leg
N: obturator n.

Question 17

Adductor magnus

Answer 17

O: pubis, ischium
I: linea aspera, adductor tubercle (adductor canal for femoral artery and vein)
A: adduct femur (adductor), extend femur (hamstring)
N: obturator & sciatic n.

Question 18

Semitendinosus

Answer 18

O: ischial tuberosity
I: upper medial tibia (pes anserine)
A: extend femur (hip); flex & medially rotate leg (knee)
N: tibial portion of sciatic n.

Question 19

Biceps femoris

Answer 19

O: long head: ischial tuberosity
short head: linea aspera
I: head of fibula
A: LH: extend femur (hip); flex & laterally rotate leg (knee)
SH: flex & laterally rotate leg (knee)
N: LH: tibial portion of sciatic n.
SH: common fibular portion of sciatic n.

Question 20

Semitendinosus

Answer 20

O: ischial tuberosity
I: upper medial tibia (pes anserine)
A: extend femur (hip); flex & medially rotate leg (knee)
N: tibial portion of sciatic n.

Question 21

Semimembranosus

Answer 21

O: ischial tuberosity
I: medial condyle of tibia
A: extend femur (hip); flex & medially rotate leg (knee)
N: tibial portion of sciatic n.