thigh region

Question 1

what is spiral line of femur?

Answer 1

line that is continuous with intertrochanteric line. Remember where it is for exam.

Question 2

origin and insertion of iliopsoas muscle

Answer 2

origin: psoas major 0 T12 to L5 vertebrae. Iliacus - iliac fossa
insertion: lesser trochanter of femur

Question 3

what is major action of iliopsoas?

Answer 3

major flexor of thigh

Question 4

what innervates iliopsoas?

Answer 4

ventral rami of lumbar nerves and femoral nerve

Question 5

What muscle in the anterior compartment of the thigh is not innervated by the femoral nerve?

Answer 5

the tensor fascia lata, which is innervated by the superior gluteal nerve

Question 6

which quadriceps femoris muscle does not originate at shaft of femur?

Answer 6

rectus femoris: origin anterior inferior iliac spine. acetabular brim.

Question 7

where do all quadriceps femoris muscles insert?

Answer 7

patella and then into tibial tuberosity via ligamentum patellae.

Question 8

What do all quadriceps femoris muscles do?

Answer 8

extend the leg

Question 9

where does articularis genu originate? insert?

Answer 9

origin: shaft of femur
insert: capsule of knee joint

Question 10

where does tensor fascia lata originate? insert?

Answer 10

origin: gluteal surface of ala of ilium

insert : iliotibial tract. gerdy’s tubercle on lateral condyle of tibia

Question 11

what is the action of tensor fascia lata?

Answer 11

stabilizes the hip joint. steadies femur on the tibial condyles.

Question 12

origin and insertion points of sartorius

Answer 12

origin: anterior superior iliac spine
insertion: pes anserinus (superior part of medial surface of shaft of tibia)

Question 13

action of sartorius

Answer 13

abducts, flexes, and laterally rotates the thigh. flexes and medially rotates the leg.

Question 14

what action is the rectus femoris’s alone?

Answer 14

flexes the thigh

Question 15

what action is the vastus medialis alone?

Answer 15

pulls patella medially

Question 16

what action is the vastus lateralis alone?

Answer 16

pulls patella laterally

Question 17

what is action of articularis genu?

Answer 17

retracts the capsule of the knee joint during extension

Question 18

what muscle of medial compartment of thigh is not innervated by obturator nerve?

Answer 18

pectineus

Question 19

origin and insertion of pectineus

Answer 19

o: superior ramus of pubis
i: shaft of femur

Question 20

action of pectineus

Answer 20

adduct the thigh

Question 21

origin and insertion of gracilis

Answer 21

o: body and inferior ramus of pubis
i: pes anserinus

Question 22

action of gracilis:

Answer 22

adducts the thigh. flexes and medially rotates the leg

Question 23

where do all aductor muscles of medial compartment insert?

Answer 23

shaft of femur

Question 24

where does adductor longus originate?

Answer 24

body of pubis

Question 25

origin of adductor brevis

Answer 25

body and inferior ramus of pubis

Question 26

origin ofadductor magnus

Answer 26

inferior ramus of pubis, ramus and body of ischium.

Question 27

origin and insertion of obturator externus

Answer 27

o: external surface of obturator membrane i: greater trochanter

Question 28

action of obturator externus

Answer 28

laterally rotates the thigh

Question 29

where do all hamstring muscles originate?

Answer 29

ischial tuberosity

Question 30

where do heads of biceps femors insert?

Answer 30

head of fibula

Question 31

where does short head of biceps femoris originate?

Answer 31

shaft of femur

Question 32

where does semitendinosus insert?

Answer 32

pes anserinus

Question 33

where does semimembranosus insert?

Answer 33

posteror aspect of medial condyle of tibia

Question 34

action of semintendinosus and semimenbranosus

Answer 34

extend thigh. flex and medially rotate the leg

Question 35

action of biceps femoris

Answer 35

extend thigh. flex and laterally rotate leg

Question 36

what muscle in posterior thigh compartment is not inervated by tibial portion of sciatic nerve?

Answer 36

short head of biceps femoris. it is innervated by common peroneal portion of sciatic nerve.