Flexors of the knee

Question 1

Biceps femoris

Answer 1

Origin:
- Long head: Ischial tuberosity
- Short head: Linea aspera
Insertion:
Head of fibula and lateral aspect of lateral tibial condyle
Innervation:
Sciatic nerve L5-S2

Question 2

Semi membranosus

Answer 2

Origin:
Ischial tuberosity
Insertion:
Posterior-medial surface of medial tibial condyle 
Innervation:
Sciatic nerve L5-S2

Question 3

Semi tendinosus

Answer 3

Origin:
Ischial tuberosity
Insertion:
Anterio-medial aspect of proximal tibial shaft, “pes anserinus”
Innervation:
Sciatic nerve L5-S2

Question 4

Gastrocnemius

Answer 4

Origin:
- Lateral head: lateral femoral condyle
- Medial head: medial femoral condyle
Insertion:
Achille’s tendon
Innervation: 
Tibial nerve S1,2

Question 5

Sartorius

Answer 5

Origin: 
Anterior Superior Iliac Spine
Insertion: 
Antero-medial aspect of proximal tibial shaft, “pes anserinus”
Innervation:
Femoral nerve L2,3,4

Question 6

Popliteus

Answer 6

Origin:
Lateral aspect of lateral femoral condyle
Insertion:
Posterior aspect of proximal tibia 
Innervation:
Tibial nerve L4,5, S1