Muscles Of The Foot

Question 1

Origin and insertion of the extensor digitorum brevis (dorsal aspect)

Answer 1

-originates from the calcaneus and inferior extensor retinaculum
-attaches onto the long extensor tendons of toes 2-4
-innervation: deep fibular nerve

Question 2

Origin and Insertion of the extensor hallucis brevis (dorsal aspect)

Answer 2

-originates from the calcaneus and inferior extensor retinaculum
-attaches to the base of the proximal phalanx of the great toe
-innervation: deep fibular nerve

Question 3

First layer- origin and insertion of the abductor hallucis (plantar aspect)

Answer 3

-originates from the medial tubercle of the calcaneus, flexor retinaculum and the plantar aponeurosis
-attaches to the medial base of the proximal phalanx of the great toe
-innervation: medial plantar nerve

Question 4

First layer: origin and insertion of the flexor digitorum brevis (plantar aspect)

Answer 4

-originates from the medial tubercle of the calcaneus and the plantar aponeurosis
-attaches to the middle phalanges of the lateral four digits
-innervation: medial plantar nerve

Question 5

First layer: original and insertion of abductor digiti minimi (plantar aspect)

Answer 5

-originates from the medial and lateral tubercles of the calcaneus and the plantar aponeurosis
-attaches to the lateral base of the proximal phalanx of the 5th digit
-innervation: lateral plantar nerve

Question 6

Second layer: Origin and insertion of quadratus plantae (plantar aspect)

Answer 6

-originates from the medial and lateral planter surface of the calcaneus
-attaches to the tendons of flexor digitorum longus
-innervation: lateral plantar nerve

Question 7

Second layer: original and insertion of the lumbricals (plantar aspect)

Answer 7

-originates from the tendons of flexor digitorum longus
-attaches to the extensor hoods of the lateral four digits
Innervation: (medial lumbricals) medial plantar nerve
(Lateral three lumbricals) lateral plantar nerve

Question 8

Third layer: original and insertion of the flexor hallucis brevis (plantar aspect)

Answer 8

-(lateral head): originates from the plantar surfaces of the cuboid and lateral cuneiforms
-(medial head): originates from the tendon of the posterior tibialis tendon
-fibres converge into a single muscle belly, attaches to the proximal phalanx of the great toe
-innervation: medial plantar nerve

Question 9

Third layer: origin and insertion of the adductor hallucis (plantar aspect)

Answer 9

-(oblique head): originates from the bases of the 2nd, 3rd and 4th metatarsals
-(transverse head)- originates from the plantar ligaments of the metatarsophalangeal joints
-both heads attach to the lateral aspect of the base of the proximal phalanx of the great toe
-innervation: deep branch of the lateral plantar nerve

Question 10

Third layer: origin and insertion of the flexor digiti minimi brevis (plantar aspect)

Answer 10

-originates from the base of the 5th metatarsal
-attaches to the base of the proximal phalanx of the fifth digit
-innervation: superficial branch of the lateral plantar nerve

Question 11

Fourth layer: origin and insertion of the plantar interossei (plantar aspect)

Answer 11

-originates from the medial side of the metatarsals three to five.
-attaches to the medial sides of the phalanges of digits three to five
-innervation: lateral plantar nerve

Question 12

Fourth layer: origin and insertion of the dorsal interossei (plantar aspect)

Answer 12

-originates from the lateral aspect of the metatarsals.
-First muscle attaches to the medial side of the proximal phalanx of the second digit.
- second to fourth interossei attach to the lateral sides of the proximal phalanxes of digits two to four
-innervation: lateral plantar nerve