Plantar Intrinsic Muscles of the Foot Flashcards Preview

Spot Test 2- Lower Limb > Plantar Intrinsic Muscles of the Foot > Flashcards

Flashcards in Plantar Intrinsic Muscles of the Foot Deck (45):
1

Muscles in First (Superficial) plantar layer

Flexor Digitorum Brevis
Abductor Hallucis
Abductor Digiti Minimi

2

Origin of Flexor Digitorum Brevis

Medial process of Calcaneal Tuberosity
Plantar Aponeurosis

3

Insertion of Flexor Digitorum Brevis

Middle Phalanges of Toes 2-5

4

Innervation of Flexor Digitorum Brevis

Medial Plantar Nerve (S1-S3)

5

Function of Flexor Digitorum Brevis

Flexion of Toes 2-5 at Proximal Interphalangeal Joint

6

Origin of Abductor Hallucis

Medial Process of Calcaneal Tuberosity

7

Insertion of Abductor Hallucis

Proximal Phalanx of Toe 1

8

Innervation of Abductor Hallucis

Medial Plantar Nerve (S1-S3)

9

Function of Abductor Hallucis

Abduction and flexion of Toe 1 at MTP joint

10

Origin of Abductor Digiti Minimi

Lateral and medial processes of Calcaneal Tuberosity

Connective Tissue between CT and Metatarsal 5

11

Insertion of Abductor Digiti Minimi

Proximal Phalanx of Toe 5

12

Innervation of Abductor Digiti Minimi

Lateral Plantar Nerve (S1-S3)

13

Function of Abductor Digiti Minimi

Abduction of Toe 5 at MTP joint

14

Muscles in second plantar layer

Quadratus Plantae
Lumbricals x4

15

Origin of Quadratus Plantae

Medial Calcaneus
Lateral Calcaneal Tuberosity

16

Insertion of Quadratus Plantae

Flexor Digitorum Longus tendon

17

Innervation of Quadratus Plantae

Lateral Plantar Nerve (S1-S3)

18

Function of Quadratus Plantae

Flexion of Toes 2-5
(assists Flexor Digitorum Longus)

19

Origin of Lumbricals

Medial Tendon of FDL to Toe 1 (1st Lumbrical)

Adjacent FDL tendons of Toes 2-4 (Lumbricals 2-4)

20

Insertion of Lumbricals

Extensor Hoods of Toes 2-5

21

Innervation of Lumbricals

Medial Plantar Nerve (Lumbrical 1)

Lateral Plantar Nerve (Lumbricals 2-4)

22

Function of Lumbricals

Flexion of MTP and extension of interphalangeal joints

(similar to hand lumbricals)

23

Muscles in Third Intrinsic layer

Flexor Hallucis Brevis
Flexor Digiti Minimi Brevis
Adductor Hallucis

24

Origin of Flexor Hallucis Brevis

Cuboid and Lateral Cuneiform
Tibialis Posterior Tendon

25

Insertion of Flexor Hallucis Brevis

Proxmial Phalanx of Toe 1 (lateral and medial sides as two heads)

26

Innervation of Flexor Hallucis Brevis

Medial Plantar Nerve (S1-S2)

27

Function of Flexor Hallucis Brevis

Flexes Toe 1 at MTP joint

28

Origin of Adductor Hallucis

TRANSVERSE HEAD: Metatarsophalangeal Ligaments of Toes 3-5

OBLIQUE HEAD: Base of Metatarsals 2-4, sheath covering fibularis longus

29

Insertion of Adductor Hallucis

Proximal Phalanx of Toe 1

30

Innervation of Adductor Hallucis

Lateral Plantar Nerve (S2-S3)

31

Function of Adductor Hallucis

Adducts Toe 1 at MTP joint

32

Origin of Flexor Digiti Minimi Brevis

Base of Metacarpal 5

Sheath of Fibularis Longus Tendon

33

Insertion of Flexor Digiti Minimi Brevis

Proximal Phalanx of Toe 5

34

Innervation of Flexor Digiti Minimi Brevis

Lateral Plantar Nerve

35

Function of Flexor Digiti Minimi Brevis

Flexion of Toe 5 at MTP joint

36

Muscles in Fourth (deepest) Intrinsic layer

4x Dorsal Interossei
3x Palmar Interossei

37

Origin of Dorsal Interossei

Sides of Adjacent Metatarsals

38

Insertion of Dorsal Interossei

Proximal Phalanges/Extensor Hoods of Toes 2-5

39

Innervation of Dorsal Interossei

Lateral Plantar Nerve

(Dorsal interossei 1 and 2 are also innervated by the Deep Fibular Nerve)

40

Function of Dorsal Interossei

Abduction (DAB)
of Toes 2-5

41

Origin of Plantar Interossei

Metatarsals 3-5

42

Insertion of Plantar Interossei

Proximal Phalanges/Extensor Hoods of Toes 3-5

43

Innervation of Plantar Interossei

Lateral Plantar Nerve (S2-S3)

44

Function of Plantar Interossei

Adduction (PAD) of Toes 3-5

45

So which 4 plantar muscles are innervated by the Medial Plantar Nerve

(all the rest are innervated by Lateral Plantar Nerve)

Flexor Digitorum Brevis (1st Layer)
Abductor Hallucis (1st Layer)
Lumbrical 1 (2nd Layer)
Flexor Hallucis Brevis (3rd Layer)