Lecture 22

Question 1

Extrinsic muscles

Answer 1

The muscles of the leg

Question 2

Intrinsic muscles of the foot

Answer 2

-move the tarsals, metatarsals and phalanges and they originate and insert only on those bones
-Arranged in 4 layers

Question 3

Intrinsic muscles on dorsal aspect

Answer 3

-extensor digitorum brevis
-extensor hallucis brevis

Question 4

Innervation of the foot muscles

Answer 4

The medial and lateral plantar branches of the tibial nerve

Question 5

Innervation of the extensor digittorum brevis

Answer 5

deep fibular nerve

Question 6

1st layer of the plantar intrinsic muscles (3)

Answer 6

-abductor digiti mini
-abductor hallucis
-Flexor digitorum brevis

Question 7

Abductor digiti mini

Answer 7

(I) proximal phalanx of the 5th toe
(A) abduction of the 5th tie and the MTP joint

Question 8

Abductor hallucis

Answer 8

(I) proximal phalanx of great toe
(A) abduct the great toe at the MTP joint

Question 9

Flexor digitorum brevis

Answer 9

(I) Middle phalanges of toes 2-5

(A) flexion at proximal interphalangeal joint

Question 10

2nd layer of the plantar intrinsic muscles

Answer 10

Lumbricals
Quadratus plantae

Question 11

Lumbricals of the foot

Answer 11

(O) tendons of the flexor digitorum longus
(I) extensor digitorum longus

(A) flexion at the MTP joints and extension and the proximal inter phalangeal joints

Question 12

Quadratus plantae

Answer 12

(O) calcaneus
(I) tendon if flexor digitourm longus

(A) flex the joints of toes 2-5

Question 13

3rd layer of the intrinsic muscles of the plantar muscles

Answer 13

Flexor hallucis brevis
Adductor hallucis
Flexor digit minimi brevis

Question 14

Adductor hallucis

Answer 14

(O) base of metatarsal 2-4
(I) proximal phalanx of great toe
(A) adduction at the MTP joint of great toe

Question 15

Flexor digiti minimi brevis

Answer 15

(O) base of the 5th metatarsal
(I) proximal phalanx of toe 5
(A) flexion at the MTP joint of toe 5

Question 16

Flexor hallucis brevis

Answer 16

(O) cuboid, lateral cuneiform
(I) proximal phalanx of great toe
(A) flexion at the MTP joint of the great toe

Question 17

Deepest layer of plantar intrinsic muscles

Answer 17

Plantar interossei and dorsal interossi

Question 18

Plantar interossei

Answer 18

(O) base and medial sides of single metatarsals 3-5
(I) medial sides of phalanges of toes 3-5
Action - PAD

Question 19

Dorsal interossei

Answer 19

(O) sides of the metatarsals
(In) medial and lateral sides of toe 2 and lateral sides of toes 3 and 4
(A) DAB

Question 20

Intrinsic muscles on dorsal foot innervated by the deep fibular nerve

Answer 20

Extensor digitourm brevis
Extensors hallucis brevis

Question 21

Extensor digitorum brevis

Answer 21

(O) Calcaneous
(I) dorsal surfaces of toes 1-4
(A) extension of the metatarsal phalangeal joints

innovated by the deep fibula nerve

Question 22

Extensor Hallucis brevis 

Answer 22

(O) superior surface of anterior Calcaneus
(I) dorsal surface of the base of proximal phalanx
(A) extension of great toe

Question 23

Arches of the foot

Answer 23

Formed by the tarsal and metatarsal bones
Strengthened by ligaments and tendons
Allows foot to bear weight think (of a spring )

Question 24

Arches (3)

Answer 24

Medial and lateral longitudinal arch
Transverse arch

Question 25

Plantar aponeurosis (4)

Answer 25

The thickening of deep fissure in the sole of the foot

attached to the calcaneous and extends forward as a thick band

the fibre is diverge and form digital bands which enter into the toes and connect to the bones ligaments and skin

the function of it is to support the longitudinal arch

Question 26

Deep fibular nerve innervates ?

Answer 26

Extensor digitourm brevis
First 2 dorsal interossei muscles