Posterior Lower Leg Muscles

Question 1

What is the MA for the Gastrocnemius?

Answer 1

Plantar flexion of the ankle joint when the knee joint is extended

Raises the heel during walking

Flexion of the knee joint

Question 2

What is the PA for the Gastrocnemius?

Answer 2

Medial Head: popliteal surface of femur

Lateral Head: lateral femoral condyle

Question 3

What is the DA for the Gastrocnemius?

Answer 3

Calcaneus via calcaneal/achilles tendon

Question 4

What is the N of the Gastrocnemius?

Answer 4

Tibial nerve (S1 & S2)

Question 5

What is the MA for the Soleus?

Answer 5

Plantar flexion from any knee position and stabilization of the ankle joint

Question 6

What is the PA for the Soleus?

Answer 6

Posterior fibula, soleal line and medial tibia, and tendinous arch between the bony attachments

Question 7

What is the DA for the Soleus?

Answer 7

Calcaneus via calcaneal/achilles tendon

Question 8

What is the N of the Soleus?

Answer 8

Tibial nerve (S1 & S2)

Question 9

What is the MA for the Plantaris?

Answer 9

Weakly assists the gastrocnemius with plantar flexion of the ankle joint

Question 10

What is the PA for the Plantaris?

Answer 10

Lateral supracondylar line of femur and oblique popliteal ligament

Question 11

What is the DA for the Plantaris?

Answer 11

Calcaneus via calcaneal/achilles tendon

Question 12

What is the N for the Plantaris?

Answer 12

Tibial nerve (S1 & S2)

Question 13

What is the MA for the Popliteus?

Answer 13

Unlocks knee by rotating femur 5° on fixed tibia

Medial rotation of the tibia of unplanted limb

Question 14

What is the PA for the Popliteus?

Answer 14

Lateral condyle of femur and lateral menisus

Question 15

What is the DA for the Popliteus?

Answer 15

Posterior tibia- above the soleal line

Question 16

What is the N of the Popliteus?

Answer 16

Tibial nerve (L4, L5, & S1)

Question 17

What is the MA for the Flexor Hallicus Longus?

Answer 17

Flexion at all joints of the great toe

Weak plantar flexion of the ankle joint

Supports medial longitudinal arch

Question 18

What is the PA for the Flexor Hallicus Longus?

Answer 18

Lower posterior surface of fibula and interosseous membrane

Question 19

What is the DA for the Flexor Hallicus Longus?

Answer 19

Base of distal phalanx of great toe

Question 20

What is the N of the Flexor Hallicus Longus?

Answer 20

Tibial nerve (S2 & S3)

Question 21

What is the MA for the Flexor Digitorum Longus?

Answer 21

Flexion of digits 2-5

Plantar flexion of the ankle joint

Supports longitudinal arches

Question 22

What is the PA for the Flexor Digitorum Longus?

Answer 22

Posterior tibia- inferior to the soleal line

By a broad tendon to fibula

Question 23

What is the DA for the Flexor Digitorum Longus?

Answer 23

Bases of distal phalanges of digits 2-5

Question 24

What is the N of the Flexor Digitorum Longus?

Answer 24

Tibial nerve (S2 & S3)

Question 25

What is the MA for the Tibialis Posterior?

Answer 25

Plantar flexion of the ankle joint

Inversion of the foot

Maintains medial longitudinal arch

Question 26

What is the PA for the Tibialis Posterior?

Answer 26

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

(ATTACHES TO ALL 3 STRUCTURES OF THE LOWER LEG)

Question 27

What is the DA for the Tibialis Posterior?

Answer 27

Tuberosity of navicular, cuneiforms, cuboid, sustentaculum tali of calcaneus, and bases of 2nd, 3rd, & 4th metatarsals

ATTACHES TO 7 BONES

Question 28

What is the N of the Tibialis Posterior?

Answer 28

Tibial nerve (L4 & L5)