Leg and Foot

Question 1

Extensor Hallucis Longus

Answer 1

O: Middle, anterior surface of fibula and interosseous membrane

I: Distal phalanx of 1st toe

A: Extend the 1st toe (metatarsophalangeal and interphalangeal joints), Dorsiflex ankle (talocrural joint), Invert the foot

N: Deep peroneal L4-S1

Question 2

Tibialis Posterior

Answer 2

O: Proximal, posterior shafts of tibia and fibula; and interosseous membrane

I: All 5 tarsal bones and bases of 2nd-4th metatarsals

A: Invert the foot, Plantar flex the ankle (talocrural joint)

N: Tibial L4-S1

Question 3

Flexor Digitorum Longus

Answer 3

O: Middle, posterior surface of tibia

I: Distal phalanges of 2nd-5th toes

A: Flex the 2nd-5th toes (metatarsophalangeal and interphalangeal joints), Weak plantar flexion of ankle (talocrural joint), Invert the foot

N: Tibial L5-S2

Question 4

Flexor Hallucis Longus

Answer 4

O: Middle half of posterior fibula

I: Distal phalanx of 1st toe

A: Flex the 1st toe (metatarsophalangeal and interphalangeal joints), Weak plantar flexion of ankle (talocrural joint), Invert the foot

N: Tibial L5-S2

Question 5

Extensor Digitorum Brevis

Answer 5

O: Dorsal surface of calcaneus

I: 2nd-4th toes via the extensor digitorum longus tendons

A: Extend 2nd-4th toes (metatarsophalangeal and interphalangeal joints

N: Deep peroneal L4-S1

Question 6

Flexor Digitorum Brevis

Answer 6

O: Medial process of calcaneus and plantar aponeurosis

I: Middle phalanges of 2nd-5th toes

A: Flex middle phalanges of the 2nd-5th toes (proximal interphalangeal joints)

N: Tibial L4-S1

Question 7

Abductor Hallucis

Answer 7

O: Medial process of calcaneus and plantar aponeurosis

I: Proximal phalanx of 1st toe (medial surface) and medial sesamoid bone

A: Abduct the 1st toe (metatarsophalangeal joint), Assist to flex the 1st toe (metatarsophalangeal joint)

N: Tibial L4-S1

Question 8

Abductor Digiti Minimi

Answer 8

O: Lateral process of calcaneus and plantar aponeurosis

I: Proximal phalanx of 5th toe (lateral surface)

A: Flex the 5th toe, Assist to abduct the 5th toe (metatarsophalangeal joint)

N: Tibial S1-S2

Question 9

Gastrocnemius

Answer 9

A: FLEX the knee (tibofemoral joint)

PLANTAR FLEX the ankle (talocrural joint)

O: Condyles of the femur, posterior surfaces

I: Calcaneous via calcaneal tendon

N: Tibial S1, 2

Question 10

Soleus

Answer 10

A: PLANTAR FLEX the ankle (talocrural joint)

O: Soleal line; proximal, posterior surface of tibia and posterior aspect of head of fibula

I: Calcaneus via calcaneal tendon

N: Tibial L5, S1,2

Question 11

Plantaris

Answer 11

A: Weak PLANTAR FLEXION of the ankle(talocrural joint)

Weak FLEXION of the knee(tibiofemoral joint)

O: Lateral supracondylar line of femur

I: Calcaneus via calcaneal tendon

N: Tibial L4,5,S1,(2)

Question 12

Popliteus

Answer 12

A: MEDIALLY ROTATE the flexed knee(tibiofemoral joint)

FLEX the knee (T/F joint)

O: Lateral condyle of the femur

I: Proximal, posterior aspect of tibia

N: Tibial L4,5,S1

Question 13

Peroneus Longus

Answer 13

A: EVERT the foot

Assist to PLANTAR FLEX the ankle(talocrural joint)

O: Head of fibula and proximal two-thirds of lateral fibula

I: Base of the first metatarsal and medial cuneiform

N: Superficial peroneal L4,5,S1

Question 14

Peroneus Brevis

Answer 14

A: EVERT the foot

Assist to PLANTAR FLEX the ankle(talocrural joint)

O: Distal two-thirds of lateral fibula

I: Tuberosity of fifth metatarsal

N: Superficial peroneal L4,5,S1

Question 15

Tibialis Anterior

Answer 15

A: INVERT the foot

DORSIFLEX the ankle (talocrural joint)

O: Lateral condyle of tibia; proximal, lateral surface of tibia and interosseous membrane

I: Medial cuneiform and base of the first metatarsal

N: Deep peroneal L4,5,S1

Question 16

Extensor Digitorum Longus

Answer 16

A: EXTEND the 2nd-5th toes(metatarsalphalangeal and interphalangeal joints)

DORSIFLEX the ankle (tarocrural joint)

EVERT the foot

O: Lateral condyle of the tibia; proximal anterior shaft of fibula and interosseous membrane

I: Middle and distal phalanges of 2nd-5th toes

N: Peroneal L4,5,S1