Muscles of the posterior leg Flashcards Preview

Anatomy > Muscles of the posterior leg > Flashcards

Flashcards in Muscles of the posterior leg Deck (18):
1

How many muscles are in the posterior compartment of the leg?

7

2

What are the layers of the posterior compartment of the leg?

Superficial and deep separated by a band of fascia

3

What nerve innervates all the muscles of the posterior leg?

Tibial nerve (Branch of Sciatic nerve)

4

What is the main action of the superficial muscles of the posterior leg?

Plantar flexion

5

What muscles are the superficial muscles of the posterior leg?

Gastrocnemius
Plantaris
Soleus

6

What are the names of the 2 heads of the Gastrocnemius?

Medial and lateral

7

What type of muscle fibres make the Gastrocnemius?

Fast twitch muscles fibres

8

What muscles does the Gastrocnemius converge with to form the Calcaneal tendon?

The Soleus muscle

9

What are the main actions of the Gastrocnemius muscle?

Plantarflexes at the ankle
Flexor at the knee

10

What can the Plantaris tendon easily be mistaken for?

A nerve

11

What is the action of the Plantaris?

Plantarflexes at the ankle
Flexor at the knee
NOT ESSENTIAL FOR EITHER

12

What is the main action of the Soleus muscle?

Plantarflexes the foot at the ankle joint

13

How many deep muscles are there in the posterior leg?

4

14

Which muscles are in the deep layer of the posterior leg?

Popliteus
Tibialis posterior
Flexor digitorum longus
Flexor Hallucis longus

15

What is the main action of the Popliteus muscle?

Laterally rotates the femur on the tibia so flexion of the knee joint can occur

16

What is the action of the Tibialis posterior muscle?

Inverts and plantarflexes the foot
Maintains the medial arch of the foot

17

What is the main action of the Flexor digitorum longus?

Flexes the lateral 4 toes

18

What is the action of the Flexor Hallucis longus?

Flexes the great toe