Posterior Leg

Question 1

Gastrocnemius M. : Origin

Answer 1

• Medial head: superior to medial femoral condyle

- Lateral head: lateral aspect superior to lateral femoral condyle

Question 2

Gastrocnemius M. : Insertion

Answer 2

Posterior surface of calcaneus via tendo calcaneus (achilles tendon)

Question 3

Gastrocnemius M. : Function

Answer 3

Plantar flexion and flexes leg at knee joint

Question 4

Soleus M. : Origin

Answer 4

Horseshoe-shaped proximal attachments:

• Soleal line of tibia
• Posterior head of fibula and superior 1/4 of posterior fibula

Question 5

Soleus M. : Insertion

Answer 5

Inserts into posterior surface of calcaneus via tendo calcaneus (achilles tendon)

Question 6

Soleus M. : Function

Answer 6

Plantarflexion

Question 7

Plantaris M. : Origin

Answer 7

Lateral end of lateral supracondylar line

Its long tendon runs between gastrocnemius and soleus

Question 8

Plantaris M. : Insertion

Answer 8

Posterior surface of calcaneus via calcaneal tendon

Question 9

Plantaris M. : Function

Answer 9

• Weak plantarflexion and leg flexion

- Proposed to be a proprioceptive organ

Question 10

Popliteus M. : Origin

Answer 10

Lateral surface of lateral femoral condyle and lateral meniscus

Question 11

Popliteus M. : Insertion

Answer 11

Posterior tibia (superior to soleal line)

Question 12

Popliteus M. : Functions

Answer 12

• Unlocks extended leg by laterally rotating femur on a stationary tibia
• Also flexes leg weakly

Question 13

Flexor Hallucis Longus M. : Origin

Answer 13

Inferior 2/3 of posterior fibula

lies deep to soleus and passes inferiorly deep to flexor retinaculum

Question 14

Flexor Hallucis Longus M. : Insertion

Answer 14

Inserts into base of distal phalanx of great toe

Question 15

Flexor Hallucis Longus M. : Functions

Answer 15

• Flexes great toe
• Plantarflex foot at ankle joint

(important for toeing off during gait)

Question 16

Flexor Digitorum Longus M. : Origin

Answer 16

Posterior tibia (inferior to soleal line)

Deep to soleus and posterior to tibia. Tendon passes posterior to tibialis posterior

Question 17

Flexor Digitorum Longus M. : Insertion

Answer 17

Distal phalanx base of lateral four digits

(Tendon passes diagonally in sole of foot. Near middle of sole, divides into four tendons that pass to lateral four digits)

Question 18

Flexor Digitorum Longus M. : Functions

Answer 18

• Flexes lateral four digits

- Plantarflex foot at ankle joint

Question 19

Tibialis Posterior M. : Origin

Answer 19

• Interosseous membrane
• Posterior tibia inferior to soleal line
• Posteromedial surface of fibula

Question 20

Tibialis Posterior M. : Insertion

Answer 20

• Navicular tuberosity
• Cuneiforms
• 2-4 metatarsal bases

Question 21

Tibialis Posterior M. : Functions

Answer 21

• Inversion

- Plantarflexion

Question 22

Gastrocnemius M. : Innervation

Answer 22

Tibial Nerve

Question 23

Soleus M. : Innervation

Answer 23

Tibial Nerve

Question 24

Plantaris M. : Innervation

Answer 24

Tibial Nerve

Question 25

Popliteus M. : Innervation

Answer 25

Tibial Nerve

Question 26

Flexor Hallucis Longus M. : Innervation

Answer 26

Tibial Nerve

Question 27

Flexor Digitorum Longus M. : Innervation

Answer 27

Tibial Nerve

Question 28

Tibialis Posterior M. : Innervation

Answer 28

Tibial Nerve