Muscles of the lower leg

Question 1

Origin, insertion and action of m. Gastrocnemius:

Answer 1

O: Condyles of the femur, posterior surfaces
I: calcaneus via calcaneal tendon
A: FLEX the knee & PLANTAR FLEX the ankle

Question 2

Origin, insertion and action of m. Soleus:

Answer 2

O: soleal line; proximal posterior surface of tibia and posterior aspect of head of fibula
I: Calcaneus via calcaneal tendon
A: PLANTAR FLEX the ankle

Question 3

The Triceps Surae consists of the muscles:

Answer 3

m. gastrocnemius and m. soleus

Question 4

Origin, insertion and action of Peroneus Longus:

Answer 4

O: head of the fibula and proximal 2/3 of lateral fibula
I: Base of the tuberosity of first metatarsal and medial cuneiform
A: EVERT the foot ; assist to PLANTAR FLEX the ankle

Question 5

Origin, insertion and action of Peroneus Brevis:

Answer 5

O: distal 2/3 of lateral fibula
I: Tuberosity of fifth metatarsal
A: EVERT the foot & assist to PLANTAR FLEX the ankle

Question 6

Origin, insertion and action of Tibialis Anterior:

Answer 6

O: lateral condyle of tibia; proximal lateral surface of tibia and interosseous membrane
I: medial cuneiform and base of first metatarsal
A: INVERT the foot ; DORSIFLEX the ankle

Question 7

Origin, insertion and action of Extensor Digitorium Longus:

Answer 7

O: Lateral condyle of tibia; proximal, anterior shaft of fibula and interosseous membrane
I: middle and distal phalanges of second through fifth toes
A: EXTEND the second through fifth toes
DORSIFLEX the ankle
EVERT the foot

Question 8

Origin, insertion and action of Extensor Hallucis Longus:

Answer 8

O: Middle, anterior surface of fibula and interosseous membrane
I: distal phalanx of first toe
A: EXTEND the first toe
    DORSIFLEX the ankle
    INVERT the foor