Deep posterior muscles of leg

Question 1

How many muscles are there in the deep posterior leg compartment

Answer 1

4 muscles 
Popliteus 
Flexor Digitorum Longus 
Flexor Hallucis Longus 
Tibialis Posterior

Question 2

Popliteus

PA
DA
N
A

Answer 2

• Lateral surface of lateral condyle of femur and lateral meniscus
• Posterior surface of tibia, superior to the soleal line
• Tibial nerve
• Weak flexion
• Unlocks the knee by rotation 5 degrees on fixed tibia

Question 3

Flexor Digitorum Longus

PA
DA
N
A

Answer 3

-Posterior tibia, inferior to soleal line & tendinous attachment to fibula

-Distal phalanges of lateral 4 (digits
2-5)

-Tibial nerve

• Flexes lateral 4 digits
• Plantarflexes ankle
• Supports longitudinal arches of foot

Question 4

Flexor Hallucis Longus

PA
DA
N
A

Answer 4

• Posterior surface of fibula & interosseous membrane
• Plantar surface of distal phalanx of the great toe (Hallux)
• Tibial nerve
• Flexes the great toe
• Weak ankle plantarflexion
• Supports medial longitudinal arch of the foot

Question 5

Tibialis Posterior

PA
DA
N
A

Answer 5

• Interosseous membrane, posterior surface of tibia, inferior to soleal line, posterior fibula
• Tuberosity of the navicular, cuneiform, cuboid,
• Tibial Nerve
• Plantarflexion of ankle
• Inverts the foot