Unit 5 - Lower Limb: Deep Flexors of Posterior Compartment (Ex. IV)

Question 1

popliteus

Answer 1

O: L femoral epicondyle; P horn of L meniscus
I: P tibial surface above origin @ soleus
Inn: tibial n. (L4-S1)
A: flexion and internal (M) rotation of knee (stabilizes knee)

Question 2

tibialis P

Answer 2

O: interosseous membrane; adjacent borders of tibia and fibula
I: navicular tuberosity; M, intermediate, and L cuneiforms; bases of 2nd-4th metatarsals
Inn: tibial n. (L4-L5)
A: plantar flexion @ talocrural joint; inversion (supination) @ subtalar joint; supports longitudinal and trasnverse arches

Question 3

flexor digitorum longus

Answer 3

O: middle 1/3 of P surface of tibia
I: bases of 2nd-5th distal phalanges
Inn: tibial n. (L5-S2)
A: plantar flexion @ talocrural joint; inversion (supination) @ subtalar joint; plantar flexion @ MTPs and IPs of toes 2-5

Question 4

flexor hallucis longus

Answer 4

O: distal 2/3 of P surface of fibula; adjacent interosseous membrane
I: base of 1st distal phalanx
Inn: tibial n. (L5-S2)
A: plantar flexion @ talocrural joint; inversion (supination) @ subtalar joint; plantar flexion @ MTP and IP of 1st toe; supports M longitudinal arch