Thigh Muscles

Question 1

Muscles and innervation of the anterior compartment

Answer 1

1. Vastus Lateralis
2. Vastus Intermedius
3. Vastus Medialis
4. Rectus Femoris
5. Sartorius

All innervated by femoral nerve

Question 2

Muscles and innervation of the posterior compartment

Answer 2

1. Semimembranosus
2. Semitendinosus
3. Biceps Femoris Long Head

All innervated by tibial division of sciatic nerve

Question 3

Muscles and innervation of the Lateral compartment

Answer 3

1. Pectineus
2. Gracilis
3. Adductor Magnus
4. Adductor Longus
5. Adductor Brevis
6. Obturator Externus

All innervated by obturator nerve

Question 4

Name the origin, insertion, innervation and action of vastus lateralis.

Answer 4

Origin: Lateral lip of linea aspera and greater trochanter

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral nerve

Action: Knee extension

Question 5

Name the origin, insertion, innervation and action of vast us medialis.

Answer 5

Origin: Medial lip of linea aspera and intertrochanteric line.

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral nerve

Action: Knee extension

Question 6

Name the origin, insertion, innervation and action of vastus intermedius.

Answer 6

Origin: Anterior femoral shaft

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral nerve

Action: Knee extension

Question 7

Name the origin, insertion, innervation and action of sartorius.

Answer 7

Origin: ASIS

Insertion: Medial to tibial tuberosity

Innervation: Femoral nerve

Action: Flexion, abduction and external rotation at hip joint, extension of knee

Question 8

Name the origin, insertion, innervation and action of rectus femoris.

Answer 8

Origin: Anterior inferior iliac spine, acetabular roof

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral nerve

Action: Hip flexion and knee extension