Leg&Foot Muscles O/I

Question 1

Tibialis Anterior

Answer 1

Origin: upper 2/3 lateral surface of tibia and adj. interosseus membrane

Insertion: medial side of medial cuneiform and base 1st metatarsal

Question 2

Tibialis Posterior

Answer 2

Origin: upper part posterior surface of tibia (below soleal line), posterior surface of fibula and adj. interosseus membrane

Insertion: tubercle of navicular and medial cuneiform with expansions to all tarsal bones except talus.

Question 3

Peroneus tertius

Answer 3

Origin: lower 1/4 anterior surface fibula

Insertion: dorsal aspect base 5th metatarsal

Question 4

Peroneus longus

Answer 4

Origin: upper 2/3 lateral surface and head of fibula

Insertion: plantar surface medial cuneiform and adj. base 1st metatarsal

Question 5

Peroneus brevis

Answer 5

Origin: lower 2/3 lateral surface fibula

Insertion: tubercle on lateral base 5th metatarsal

Question 6

Extensor hallucis longus

Answer 6

Origin: middle 1/2 anterior surface fibula and adj interosseus membrane

Insertion: base dorsal surface distal phalanx of hallux

Question 7

Extensor digitorum longus

Answer 7

Origin: upper 2/3 anterior surface fibula, interosseus membrane and lateral tibial condyle.

Insertion: forms extensor hood (dorsal and digital expansion) which attaches to distal and middle phalanx of the lateral 4 toe on dorsal surface

Question 8

Gastrocnemius

Answer 8

Origin; medial head - medial supracondylar ridge and adductor tubercle of femur;
Lateral head - outer surface lateral condyle of femur

Insertion: via tendocalcaneus to posterior surface calcaneus

Question 9

Soleus

Answer 9

Origin: soleal line posterior surface of tibia, posterior surface upper third fibula and fibrous arch between

Insertion: via tendocalcaneus with gastrocnemius into posterior surface calcaneus.

Question 10

Plantaris

Answer 10

Origin: lateral supracondylar ridge of femur

Insertion: joins tendocalcaneus

Question 11

Flexor hallucis longus

Answer 11

Origin: unipennate muscle arising lower 2/3 posterior surface of fibula.

Insertion: plantar surface base of distal phalanx

Question 12

Flexor digitorum longus

Answer 12

Origin: medial part posterior surface of tibia below soleal line

Insertion: tendon passes behind medial malleolus and divides into 4 to insert into plantar surface base distal phalanx of the lateral 4 toes.

Question 13

Extensor digitorum brevis

Answer 13

Origin: anterior part upper surface calcaneus

Insertion: lateral side extensor hood 2nd-4th toes and by tendon into dorsal surface proximal phalanx of hallux (ext. hall. brev.)

Question 14

Abductor hallucis

Answer 14

Origin: plantar aponeurosis and medial tubercle calcaneus

Insertion: medial side base proximal phalanx hallux

Question 15

Flexor digitorum brevis

Answer 15

Origin: medial tubercle calcaneus and plantar aponeurosis

Insertion: base middle phalanx of lateral 4 toes

Question 16

Abductor digiti minimi

Answer 16

Origin: plantar aponeurosis and medial tubercle calcaneus

Insertion: medial side base proximal phalanx hallux

Question 17

Flexor accessorius

Answer 17

Origin: medial and lateral tubercles of calcaneus

Insertion: tendon of FDL at midpoint of sole

Question 18

Lumbricals

Answer 18

Origin: from tendons of FDL; 1st from medial side of tendon to 2nd toe, the others arise from adj. tendons of FDL

Insertion: medial side extensor hood and base proximal phalanx

Question 19

Flexor hallucis brevis

Answer 19

Origin: medial side plantar surface cuboid and adj. lateral cuneiform

Insertion: base proximal phalanx of big toe via two tendons, each containing a sesamoid bone

Question 20

Adductor hallucis

Answer 20

Origin: oblique head - plantar surfaces bases 2nd, 3rd, 4th metatarsals
transverse head - plantar surface lateral 3 metatarsophalangeal joints and their ligaments

Insertion: lateral side base proximal phalanx hallux

Question 21

Flexor digiti minimi brevis

Answer 21

Origin: plantar aspect base 5th metatarsal

Insertion: plantar surface proximal phalanx little toe

Question 22

Plantar interossei

Answer 22

Origin: plantar and medial aspects of 3rd, 4th, 5th metatarsals

Insertion: medial side base proximal phalanx of same toe

Question 23

Dorsal interossei

Answer 23

Origin: sides of adj. metatarsals

Insertion: insert into lateral side proximal phalanx of 2nd, 3rd, 4th toes and medial side 2nd toe.