Posterior Leg Muscles

Question 1

Gastrocnemius Origin

Answer 1

Medial Head - Medial Condyle of the Femur

Lateral Head - Lateral Condyle of the Femur

Question 2

Gastrocnemius Attachment

Answer 2

Muscle bellies of the two heads converge and join with the Soleus muscle to form the Calcaneal Tendon (Achilles Tendon), Which attaches the the Calcaneus.

Question 3

Gastrocnemius Action

Answer 3

Plantarflexion of the Foot

Flexion of the Knee

Question 4

Gastrocnemius Innveration

Answer 4

Tibial nerve (L4/L5/S1/S2/S3)

Question 5

Soleus Origin

Answer 5

Soleal Line of the Tibia and Proximal Fibular Area

Question 6

Soleus Attachment

Answer 6

Forms part of the Calcaneal Tendon - attaches to the Calcaneus Bone.

Question 7

Soleus Innveration

Answer 7

Tibial nerve (L4/L5/S1/S2/S3)

Question 8

Soleus Action

Answer 8

Plantarflexion

Question 9

Plantaris Origin

Answer 9

Lateral Supracondylar Line of the Femur

Question 10

Plantaris Attachment

Answer 10

Blends with the Calcaneal Tendon

Question 11

Plantaris Action

Answer 11

Plantarflexion of the Foot
Flexion of the Knee
(Only an accessory muscle - not vital for function)

Question 12

Plantaris Innveration

Answer 12

Tibial nerve (L4/L5/S1/S2/S3)

Question 13

Which is the most Superfical Muscle in the Posterior Compartment?

Answer 13

Gastrocnemius

Question 14

How many muscles make up the Superficial Compartment of the Posterior Leg?

Answer 14

3 - Gastrocnemius
Plantaris
Soleus

Question 15

How many muscles make up the Deep Compartment of the Posterior Leg?

Answer 15

4 - Tibialis Posterior
Popliteus
Flexor Digitorum Longus
Flexor Hallucis Longus

Question 16

Tibialis Posterior Origin

Answer 16

Interosseous Membrane between the Tibia and Fibula, and Posterior Surfaces of these Two Bones.

Question 17

Tibialis Posterior Attachment

Answer 17

Plantar Surfaces of the Medial Tarsal Bones

Question 18

Tibialis Posterior Action

Answer 18

Inversion and Plantarflexion of the Foot.

Maintains the Medial Arch of the Foot

Question 19

Tibialis Posterior Innveration

Answer 19

Tibial nerve (L4/L5/S1/S2/S3)

Question 20

Popliteus Origin

Answer 20

Posterior Surface of the Proximal Tibia

Question 21

Popliteus Attachment

Answer 21

Lateral Condyle of the Femur

Question 22

Popliteus Action

Answer 22

Laterally Rotates the Femur on the Tibia – ‘Unlocking’ the Knee Joint so that Flexion can occur

Question 23

Popliteus Innveration

Answer 23

Tibial nerve (L4/L5/S1/S2/S3)

Question 24

Flexor Digitorum Longus Origin

Answer 24

Medial surface of the tibia

Question 25

Flexor Digitorum Longus Attachment

Answer 25

Plantar Surfaces of the Lateral Four Digits

Question 26

Flexor Digitorum Longus Action

Answer 26

Flexion of the Lateral 4 Toes

Question 27

Flexor Digitorum Longus Innveration

Answer 27

Tibial nerve (L4/L5/S1/S2/S3)

Question 28

Flexor Hallucis Longus Origin

Answer 28

Posterior Surface of the Fibula

Question 29

Flexor Hallucis Longus Attachment

Answer 29

Plantar Surface of the Phalanx of the Great Toe

Question 30

Flexor Hallucis Longus Action

Answer 30

Flexes the Great Toe

Question 31

Flexor Hallucis Longus Innveration

Answer 31

Tibial nerve (L4/L5/S1/S2/S3)

Question 32

Which is the Deepest Muscle of the Posterior Compartment of the Leg?

Answer 32

Tibialis Posterior

Question 33

Which Muscle of the Deep Posterior Compartment is the most Lateral?

Answer 33

Flexor Hallucis Longus

Question 34

Which Muscle of the Deep Posterior Compartment is the most Medial?

Answer 34

Flexor Digitorum Longus

Question 35

Which Nerve Roots does the Calcaneal Reflex Test?

Answer 35

S1 and S2

Question 36

Which Way does the Knee “Unlock”?

Answer 36

Rotates Laterally