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Anatomy > O & I: Foot Muscles > Flashcards

O & I: Foot Muscles Flashcards

1
Q

What muscles are in the 1st layer of the sole of the foot?

A

(1) Abductor Hallucis
(2) Flexor Digitorum Brevis
(3) Abductor Digit Minimi

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2
Q

What muscles are in the 2nd layer of the sole of the foot?

A

(1) Quadratus Plantae

(2) Lumbricals

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3
Q

What muscles are in the 3rd layer of the sole of the foot?

A

(1) Flexor Hallucis Brevis
(2) Adductor Hallucis
(3) Flexor Digiti Minimi Brevis

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4
Q

What muscles are in the 4th layer of the sole of the foot?

A

(1) Plantar Interossei (three muscles)

2) Dorsal interossei (four muscles

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5
Q

What muscles are on the dorsum of the foot?

A

(1) Extensor Digitorum Brevis

(2) Extensor Hallucis Brevis

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6
Q

Origin: Abductor Hallucis

A

medial tubercle of calcaneus; flexor retinaculum; plantar aponeurosis

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7
Q

Insertion: Abductor Hallucis

A

medial side of base of proximal phalanx of 1st digit

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8
Q

Innervation: Abductor Hallucis

A

medial plantar nerve (S2, S3)

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9
Q

Action: Abductor Hallucis

A

abducts and flexes 1st digit (great toe, hallux)

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10
Q

Origin: Flexor Digitorum Brevis

A

medial tubercle of calcaneus; plantar aponeurosis; intermuscular septa

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11
Q

Insertion: Flexor Digitorum Brevis

A

both sides of middle phalanges of lateral four digits

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12
Q

Innervation: Flexor Digitorum Brevis

A

medial plantar nerve (S2, S3)

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13
Q

Action: Flexor Digitorum Brevis

A

flexes lateral four digits

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14
Q

Origin: Abductor Digiti Minimi

A

medial and lateral tubercles of calcaneus; plantar aponeurosis; intermuscular septa

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15
Q

Insertion: Abductor Digiti Minimi

A

lateral side of base of proximal phalanx of 5th digit

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16
Q

Innervation: Abductor Digiti Minimi

A

lateral plantar nerve (S2, S3)

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17
Q

Action: Abductor Digiti Minimi

A

abducts and flexes little toe (5th digit)

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18
Q

Origin: Quadratus Plantae

A

Medial surface and lateral margin of plantar surface of calcaneus

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19
Q

Insertion: Quadratus Plantae

A

Posteriolateral margin of tendon of flexor digitorum longus

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20
Q

Innervation: Quadratus Plantae

A

Lateral plantar nerve (S2, S3)

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21
Q

Action: Quadratus Plantae

A

assits flexor digitorum longus in flexing lateral four digits

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22
Q

Origin: Lumbricals

A

tendons of flexor digitorum longus

23
Q

Insertion: Lumbricals

A

medial aspect of expansion over lateral four digits

24
Q

Action: Lumbricals

A

flex proximal phalanges; extend middle and distal phalanges of lateral four digits

25
Q

Innervation: Lumbricals

A

Medial one: medial plantar nerve (S2, S3)

Lateral three: lateral plantar nerve (S2, S3)

26
Q

Origin: Flexor Hallucis Brevis

A

plantar surfaces of cuboid and lateral cuneiforms

27
Q

Insertion: Flexor Hallucis Brevis

A

both sides of base of proximal phalanx of 1st digit

28
Q

Innervation: Flexor Hallucis Brevis

A

medial plantar nerve (S2, S3)

29
Q

Action: Flexor Hallucis Brevis

A

flexes proximal phalanx of 1st digit

30
Q

Origin: Adductor Hallucis

A

Oblique Head: bases of metatarsals 2-4

Transverse Head: Plantar ligaments of metatarsophalangeal (MTP) joints

31
Q

Insertion: Adductor Hallucis

A

lateral side of base of proximal phalanx of 1st digit

32
Q

Innervation: Adductor Hallucis

A

deep branch of lateral plantar nerve (S2, S3)

33
Q

Action: Adductor Hallucis

A

traditionally said to adduct 1st digit; assist in transverse arch of foot by metatarsals medially

34
Q

Origin: Flexor Digiti Minimi Brevis

A

Base of 5th metatarsal

35
Q

Insertion: Flexor Digiti Minimi Brevis

A

base of proximal phalanx of 5th digit

36
Q

Innervation: Flexor Digiti Minimi Brevis

A

superficial branch of lateral plantar nerve (S2, S3)

37
Q

Action: Flexor Digiti Minimi Brevis

A

flexes proximal phalanx of 5th digit, thereby assisting with its flexion

38
Q

Origin: Plantar interossei

A

plantar aspect of medial sides of shafts of metatarsals 3-5

39
Q

Insertion: Plantar Interossei

A

medial sides of bases of phalanges of 3rd- 5th digits

40
Q

Innervation: Plantar Interossei

A

lateral plantar nerve (S2, S3)

41
Q

Action: Plantar Interossei

A

adduct digits 3-5 and flex metatarsophalangeal joints

42
Q

Origin: Dorsal Interossei

A

adjacent sides of shafts of metatarsals 1-5

43
Q

Insertion: Dorsal Interossei

A

1st: medial side of proximal phalanx of 2nd digit

2nd - 4th: lateral sides of 2nd - 4th digits

44
Q

Innervation: Dorsal interossei

A

lateral plantar nerve (S2, S3)

45
Q

Action: Dorsal Interossei

A

abduct digits 2-4 and flex metatarsophalangeal joints

46
Q

Origin: Extensor Digitorum Brevis

A

Calcaneus (floor of tarsal sinus); interosseous talocalcaneal ligament; stem of inferior extensor retinaculum

47
Q

Insertion: Extensor Digitorum Brevis

A

long extensor tendons of three middle digits (toes 2-4)

48
Q

Innervation: Extensor Digitorum Brevis

A

Deep Fibular Nerve (L5 or S1, or both)

49
Q

Action: Extensor Digitorum Brevis

A

aids the extensor digitroum longus in extending the four lateral toes at the metatarsophalangeal and interphalangeal joints

50
Q

Origin: Extensor Hallucis Brevis

A

Calcaneus (floor of tarsal sinus); interosseous talocalcaneal ligament; stem of inferior extensor retinaculum

51
Q

Insertion: Extensor Hallucis Brevis

A

Dorsal aspect of base of proximal phalanx of great toe (digit 1)

52
Q

Innervation: Extensor Hallucis Brevis

A

Deep Fibular Nerve (L5 or S1, or both)

53
Q

Action: Extensor Hallucis Brevis

A

aids the extensor hallucis longus in extending the greate toe at the metatarsophalangeal joint

Anatomy (25 decks)

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