The thigh

Question 1

anterior compartment of the thigh

Answer 1

rectus femoris

vastus medialis

Vastus lateralis

Vastus intermedius

Sartious

Question 2

rectus femoris origin insertion, action and nerve

Answer 2

O = Ant Inf Iliac Spine
(AIIS) and superior acetabulum

I = patella

A = Hip joint: Thigh flexion;
Knee joint: Leg extension

N = Femoral nerve (L2-L4)

Question 3

Vastusmedalis origin insertion, action and nerve

Answer 3

medial aspect of linea aspera

Tibial tuberosity (via patellar ligament), patella, (medial condyle of tibia)

Knee joint: Leg extension

Femoral nerve (L2-L4)

Question 4

Vastus lateralis origin insertion, action and nerve

Answer 4

greater trochanter and linea aspera

Tibial tuberosity (via patellar ligament), patella, (lateral condyle of tibia)

Knee joint: Leg extension

femoral nerve

Question 5

Vastus intermedius origin insertion, action and nerve

Answer 5

linea aspera and
anterior femur

base of patella via the common quadriceps tendon.

Knee joint: Leg extension

Femoral nerve (L2-L4)

Question 6

sartious origin, insertion action and nerve

Answer 6

Anterior superior iliac spine

pes anserinus

Hip joint: thigh flexion, thigh abduction, thigh external rotation
Knee joint: leg flexion, leg internal rotation

Femoral nerve (L2-L3)

Question 7

posterior compartment of the thigh

Answer 7

biceps femoris

Semitendinosus

Semimembranosus

Question 8

biceps femoris origin insertion action nerve

Answer 8

O = Long head: ischial tuberosity
Short head: linea aspera of femur

I = (Lateral aspect of) head of fibula

A = Hip joint: thigh extension, thigh external rotation;
Knee joint: leg flexion, leg external rotation; stabilizes pelvis

N= Long head: sciatic nerve (L5-S2)
Short head: common fibular division of sciatic nerve (L5-S2)

Question 9

semimembranosus origin insertion action nerve

Answer 9

Ischial tuberosity

Proximal end of tibia below medial condyle

Hip joint: Thigh extension, thigh internal rotation, stabilizes pelvis.
Knee joint: Leg flexion, leg internal rotation.

Tibial division of sciatic nerve (L5-S2)

Question 10

semitendious origin insertion action nerve

Answer 10

ischial tuberosity

Medial condyle of tibia

Hip joint: thigh extension and internal rotation
Knee joint: flexion and internal rotation of the leg
Stabilizes pelvis

Tibial division of sciatic nerve (L5 – S2)

Question 11

medial thigh compartment

Answer 11

adductor magnus
adductor brevis
adductor longus
obturator externus

Question 12

Main boundaries of the femoral triangle

Answer 12

Base = Inguinal ligament

Lateral = sartorius

Medial = adductor longus

Apex = where sartorius meets adductor longus

Floor = pectineus and iliopsoas

Question 13

adductor magnus origin insertion action

Answer 13

Origin= ischial ramus
Insertion= Gluteal tuberosity, linea aspera
Action = Thigh flexion, thigh adduction, thigh external rotation, thigh internal rotation
Innervation=Obturator nerve (L2-L4)

Question 14

adductor brevis origin insertion action

Answer 14

Origin= pubic ramus
Insertion= Linea aspera of femur
Action=thigh flexion, thigh adduction, thigh external rotation
Innervation=Obturator nerve (L2-L4)

Question 15

adductor longus origin insertion action

Answer 15

Origin= Body of pubis, pubic symphysis
Insertion=Middle third of linea aspera of femur (medial lip)
Action= Thigh flexion, Thigh adduction, Thigh external rotation; Pelvis stabilization
Innervation=Obturator nerve (L2-L4)
Blood supply Deep femoral artery, obturator artery

Question 16

obturator externus origin insertion action

Answer 16

Origin= obturator foramen
Insertion= greater trochanter of femur
Action=External rotation of extended thigh;
Abduction of flexed thigh;
Innervation =Nerve to obturator internus (L5 and S1)
Blood supply= Obturator artery