Lower Leg Muscles

Question 1

Tibialis Anterior Origin and Insertion

Answer 1

Origin-Lateral condyle of Tibia; Lateral surface of Tibia; Interosseous Membrane

Insertion- Medial Cuneiform and Base of 1st metatarsal

Question 2

Tibialis Anterior Action

Answer 2

Invert the foot; Dorsiflex the ankle

Question 3

Extensor Hallucis Longus Origin and Insertion

Answer 3

Origin- Middle, Anterior surface of Fibula and Interosseous Membrane

Insertion- Distal Phalanx of 1st toe

Question 4

Extensor Hallucis Longus Action

Answer 4

Extend the first toe; Dorsiflex the ankle; Invert the foot

Question 5

Extensor Digitorum Longus Origin and Insertion

Answer 5

Origin- Lateral condyle of Tibia; Proximal, anterior shaft of Fibula; Interosseous membrane

Insertion- Middle and distal phalanges of toes 2-5

Question 6

Extensor Digitorum Longus Action

Answer 6

Extend the 2nd-5th toes; Dorsiflex the ankle; Evert the foot

Question 7

Peroneus Longus Origin and Insertion

Answer 7

Origin- Head of Fibula and proximal lateral Fibula

Insertion- Medial cuneiform and base of 1st metatarsal

Question 8

Peroneus Longus Action

Answer 8

Evert the foot; Assist to plantarflex the ankle

Question 9

Peroneus Brevis origin and insertion

Answer 9

Origin- Distal lateral Fibula

Insertion- Tuberosity of 5th metatarsal

Question 10

Peroneus Brevis Action

Answer 10

Evert the foot; Assist to Plantarflex the ankle

Question 11

Gastrocnemius origin and insertion

Answer 11

Origin- condyles of Femur, posterior surface

Insertion- Calcaneus via Calneal tendon

Question 12

Gastrocnemius Action

Answer 12

Flex the knee; Plantarflex the ankle

Question 13

Soleus origin and insertion

Answer 13

Origin- Soleal line; Proximal, posterior surface of Tibia and posterior aspect of head of Fibula

Insertion- Calcaneus via calcaneal tendon

Question 14

Soleus Action

Answer 14

Plantarflex the ankle

Question 15

Plantaris origin and insertion

Answer 15

Origin- Lateral supracondylar line of Femur

Insertion- Calcaneus via calcaneal tendon

Question 16

Plantaris Action

Answer 16

Weak Plantarflexion of ankle; Weak flexion of knee

Question 17

Popliteus Origin and Insertion

Answer 17

Origin- Lateral condyle of Femur

Insertion- Proximal, posterior aspect of Tibia

Question 18

Popliteus Action

Answer 18

Medially rotate the flexed knee; Flex the knee

Question 19

Flexor Hallucis Longus origin and insertion

Answer 19

Origin- Middle half of posterior Fibula

Insertion- Distal phalanx of 1st toe

Question 20

Flexor Hallucis Longus Action

Answer 20

Flex the first toe; Weak plantarflexion of ankle; Invert the foot

Question 21

Flexor Digitorum Longus origin and insertion

Answer 21

Origin- Middle, posterior surface of Tibia

Insertion- Distal phalanges of 2nd-5th toes

Question 22

Flexor Digitorum Longus Action

Answer 22

Flex the second through fifth toes; Weak plantarflexion of ankle; Invert the foot

Question 23

Tibialis Posterior origin and insertion

Answer 23

Origin- Proximal posterior shafts of Tibia and Fibula; Interosseous Membrane

Insertion- All 5 tarsal bones; Bases of 2nd-4th metatarsals

Question 24

Tibialis Posterior Action

Answer 24

Invert the foot; Plantarflex the ankle