Posterior Leg - Deep

Question 1

Name the four muscles in the deep compartment of the posterior leg and also state what part of the lower limb they act on to produce movement:

Answer 1

• Popliteus - Knee joint
• Tibialis posterior, flexor hallucis longus, flexor digitorum longus - Ankle and foot

Question 2

Name the bursa which lies between the popliteal tendon and the posterior surface of the knee joint:

Answer 2

• Popliteus bursa

Question 3

Popliteus:

• Attachment:
• Action
• Innervation
• Blood supply

Answer 3

• Attachment: Lateral condyle of femur/posterior aspect of lateral meniscus - posterior tibia
• Actions: Pulls lateral meniscus posterioly (in unlocking of the knee)
• Innervation: Tibial
• Blood supply: Popliteal (genicular)

Question 4

The tibialis posterior is the ………………. out of the four muscles. It lies between the ………………….. and ……………………….

Answer 4

1. Deepest
2. Flexor Digitorum Longus
3. Flexor Hallucis Longus.

Question 5

Tibialis Posterior:

• Attachment:
• Actions: (3)
• Innervation:
• Blood supply:

Answer 5

• Attachment: Posterior surfaces of tibia/fibula & interosseous membrane - plantar surfaces of medial tarsal bones
• Actions: Plantar flexion, inversion, maintain medial arch
• Innervation: Tibial nerve
• Blood supply: Posterior tibial

Question 6

Flexor Digitorum Longus is located …………….. in the posterior leg

Answer 6

• Medially

Question 7

Flexor Digitorum Longus:

• Attachment:
• Action:
• Innervation:
• Blood supply

Answer 7

• Attachment: Medial surface of tibia - plantar surface of lateral 4 digits
• Actions: Flex lateral 4 toes
• Innervation: Tibial
• Blood supply: Posterior tibial

Question 8

The flexor hallucis longus muscle is found on the ………….. side of leg

Answer 8

• Lateral

Question 9

Flexor Hallucis Longus:

• Attachment:
• Action:
• Innervation:
• Blood supply:

Answer 9

• Attachment: Posterior surface of fibula - plantar surface of great toe
• Action: Flex great toe
• Innervation: Tibial nerve
• Blood supply: Posterior tibial