Flexors Of The Ankle And Foot

Question 1

Give actions, origins, insertions and nerve innervation for tibialis posterior

Answer 1

Tibialis Posterior
A
Invert the foot
Plantar flex the ankle (talocrural joint)
O
Proximal, posterior shafts of tibia and fibula; and interosseous membrane
I
All five tarsal bones and bases of second through fourth metatarsals
N
Tibial L(4), 5, S1

Question 2

Give actions, origins, insertions and nerve innervation for flexor digitorum longus

Answer 2

Flexor Digitorum Longus
A
Flex the second through fifth toes (metatarsophalangeal and interphalangeal joints)
Weak plantar flexion of ankle (talocrural joint)
Invert the foot
O
Middle, posterior surface of tibia
I
Distal phalanges of second through fifth toes
N
Tibial L5, S1, (2)

Question 3

Give actions, origins, insertions and nerve innervation for flexor hallicus longus

Answer 3

Flexor Hallucis Longus
A
Flex the first toe (metatarsophalangeal and interphalangeal joints)
Weak plantar flexion of ankle (talocrural joint)
Invert the foot
O
Middle half of posterior fibula
I
Distal phalanx of first toe
N
Tibial L5, S1, 2