Posterior Leg

Question 0

Gastrocnemius

Insertion

Answer 0

Posterior surface of calcaneus via calcaneal tendon

Question 1

Gastrocnemius

Origin

Answer 1

Lateral Head-lateral aspect of lateral condyle of femur

Medial head-popliteal surface of femur, superior to medial condyle

Question 2

Gastrocnemius

Innervation

Answer 2

Tibial nerve S1, S2

Question 3

Gastrocnemius

Actions

Answer 3

Plantarflexes ankle when knee is extended, raises heel during walking; and flexes knee joint

Question 4

Soleus

Origin

Answer 4

Posterior aspect of head of fibula, superior quarter of posterior surface of fibula, soleal line, and medial border of tibia

Question 5

Soleus

Insertion

Answer 5

Posterior surface of calcaneus via calcaneal tendon

Question 6

Soleus

Innervation

Answer 6

Tibial nerve S1, S2

Question 7

Soleus

Actions

Answer 7

Plantarflexes ankle; steadies leg on foot

Question 8

Plantaris

Origin

Answer 8

Inferior end of lateral supracondylar line of femur and oblique popliteal ligament

Question 9

Plantaris

Insertion

Answer 9

Posterior surface of calcaneus via calcaneal tendon

Question 10

Plantaris

Innervation

Answer 10

Tibial nerve S1, S2

Question 11

Plantaris

Actions

Answer 11

Weakly assists gastrocnemius in plantarflexing ankle; function is probably mainly proprioceptive

Question 12

Popliteus

Origin

Answer 12

Lateral surface of lateral condyle of femur and lateral meniscus

Question 13

Popliteus

Insertion

Answer 13

Posterior surface of tibia, superior to soleal line

Question 14

Popliteus

Innervation

Answer 14

Tibial Nerve L4, L5, S1

Question 15

Popliteus

Actions

Answer 15

Weakly flexes knee and unlocks it by laterally rotating femur on fixed tibia, may also medially rotate tibia of unplanted limb

Question 16

Flexor hallucis longus

Origin

Answer 16

Inferior two thirds of posterior surface of fibula and inferior part of interosseous membrane

Question 17

Flexor hallucis longus

Insertion

Answer 17

Base of distal phalanx of great toe (hallux)

Question 18

Flexor Hallucis Longus

Innervation

Answer 18

Tibial nerve S2, S3

Question 19

Flexor Hallucis Longus

Actions

Answer 19

Flexes great toe at all joints, weakly plantarflexes ankle; supports medial longitudinal arch of foot

Question 20

Flexor Digitorum Longus

Origin

Answer 20

Medial part of posterior surface of tibia inferior to soleal line and by a broad tendon to fibula

Question 21

Flexor Digitorum Longus

Insertion

Answer 21

Bases of distal phalanges of lateral four digits

Question 22

Flexor Digitorum Longus

Innervation

Answer 22

Tibial nerve S2, S3

Question 23

Flexor Digitorum Longus

Actions

Answer 23

Flexes lateral four digits; plantarflexes ankle; supports longitudinal arches of foot

Question 24

Tibialis Posterior | Origin

Answer 24

Interosseous membrane, posterior surface of tibia inferior to soleal line; and posterior surface of fibula

Question 25

Tibialis posterior | Insertion

Answer 25

Primarily to tuberosity of navicular; also to cuneiforms, cuboid, and bases of 2nd-4th metatarsals

Question 26

Tibialis Posterior | Actions

Answer 26

Plantarflexes ankle; inverts foot; supports medial longitudinal arch of foot