Anatomy Knee

Question 1

Rectus Femoris

Answer 1

O: Anterior inferior iliac spine (AIIS)
I: Tibil tuberosity via patellar ligament
A: Knee extension; NWB-Hip flexion; WB-Controls hip extension
Inn: Femoral nerve (L2-4)
BS: Femoral artery and branches from the profunda femoris artery

Question 2

Vastus Lateralis

Answer 2

O: Greater trochanter, lateral lip of linea aspera, lateral intermuscular septum
I: Tibial tuberosity via patellar ligament
A: Knee extension
Inn: Femoral nerve (L2-4)
BS: Branches from the profunda femoris artery

Question 3

Vastus Medialis

Answer 3

O: Intertrochanteric line of femur and medial linea aspera
I: Tibil tuberosity via patellar ligament
A: Knee extension
Inn: Femoral nerve (L2-4)
BS: Femoral artery and branches from the profunda femoris artery

Question 4

Vastus Intermedius

Answer 4

O: Anterior lateral femur
I: Tibial tuberosity via patellar ligament
A: Knee extension
Inn: Femoral nerve (L2-4)
BS: Femoral artery and branches from the profunda femoris

Question 5

Semimembranosus

Answer 5

O: Ischial tuberosity
I: Medial condyle of tibia
A: Knee flexion, medial rotation; NWB-Hip extension; WB-Controls hip flexion
Inn: Tibial nerve (L5-S2)
BS: Branches from the internal iliac, popliteal, and profunda femoris arteries

Question 6

Semitendinosus

Answer 6

O: Ischial tuberosity
I: Upper part medial surface of tibia
A: Knee flexion, medial rotation; NWB-Hip extension; WB-Controls hip flexion
Inn: Tibial nerve (L5-S2)
BS: Branches from the internal iliac, popliteal, and profunda femoris arteries

Question 7

Biceps Femoris-Long Head

Answer 7

O: Ischial tuberosity
I: Lateral condyle of tibia and head of fibula
A: Knee flexion, lateral rotation; NWB-Hip extension, helps with external rotation; WB-Controls hip flexion
Inn: Sciatic nerve (L5-S2)
BS: Branches from the internal iliac, popliteal, and profunda femoris arteries

Question 8

Biceps Femoris-Short Head

Answer 8

O: Linea aspera
I: Lateral condyle of tibia and head of fibula
A: Knee flexion, lateral rotation
Inn: Common peroneal nerve (L5-S1)
BS: Branches from the internal iliac, popliteal, and profunda femoris artery

Question 9

Sartorius

Answer 9

O: Anterior superior iliac spine (ASIS)
I: Upper part of medial surface of the tibia
A: Knee flexion, lateral rotation; NWB-Hip flexion, abduction, external rotation; WB-Controls hip extension, adduction, internal rotation
Inn: Femoral nerve (L2-3)
BS: Branches from the femoral artery

Question 10

Popliteus

Answer 10

O:  Lateral femoral condyle
I:  Posterior tibia above soleal line
A:  Knee flexion, medial rotation
Inn:  Tibial nerve (L5-S1)
BS:  Popliteal artery

Question 11

Gastrocnemius

Answer 11

O: Medial epicondyle of femur, Lateral epicondyle of femur
I: Calcaneus via calcaneal (Achillies tendon)
A: NWB-Ankle plantar flexion, Knee flexion; WB-Deceleration of internal rotation of lower limb, Helps deccelerate pronation, Ankle plantar flexion during push-off
Inn: Tibial nerve (S1-2)
BS: Branches from the posterior tibial artery and popliteal artery

Question 12

Plantaris

Answer 12

O: Above lateral head of gastrocnemius on femur
I: Calcaneus via calcaneal (achilies tendon)
A: Very weak knee flexor; NWB-Weak ankle plantar flexion; WB-Weak control of dorsiflexion
Inn: Tibial nerve (S1-2)
BS: Popliteal Artery