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Lower limbs > Intrinsic muscles of foot > Flashcards

Intrinsic muscles of foot Flashcards

1
Q

Origin of flexor digitorum brevis?

A

Medial surface of the calcaneal tuberosity, plantar aponeurosis and intermuscular septum

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2
Q

Insertion of flexor digitorum brevis?

A

Bases of middle phalanges of digits 2-5

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3
Q

Action of flexor digitorum brevis?

A

Flexion at metatarsophalangeal joints 2-5, supports longitudinal arch of foot

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4
Q

Innervation of flexor digitorum brevis?

A

Medial plantar nerve (S1-S3)

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5
Q

Origin of abductor digiti minimi?

A

Medial and lateral sides of the calcaneal tuberosity, plantar aponeurosis

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6
Q

Insertion of abductor digiti minimi?

A

Base of lateral surface of proximal phalanx of digit 5, 5th metatarsal

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7
Q

Action of abductor digiti minimi?

A

Abduction + flexion at metatarsophalangeal joint 5, supports longitudinal arch of foot

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8
Q

Innervation of abductor digiti minimi?

A

Lateral plantar nerve (S1-S3)

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9
Q

Origin of abductor hallucis?

A

Medial process of calcaneal tuberosity, flexor retinaculum, plantar aponeurosis

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10
Q

Insertion of abductor hallucis?

A

Base of proximal phalanx of great toe

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11
Q

Action of abductor hallucis?

A

Abduction + flexion of metatarsophalangeal joint 1, supports the longitudinal arch of foot

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12
Q

Innervation of abductor hallucis?

A

Medial plantar nerve (S1-S3)

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13
Q

Origin of the four lumbricals?

A

Tendons of flexor digitorum longus

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14
Q

Insertion of the four lumbricals?

A

Medial bases of proximal phalanges and extensor expansion of digits 2-5

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15
Q

Action of the four lumbricals?

A

Flexion + adduction of metatarsophalangeal joints 2-5, extension at interphalangeal joints 2-5

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16
Q

Innervation of the four lumbricals?

A

Lumbrical 1: Medial plantar nerve (S2-S3), lumbricals 2-4: Lateral plantar nerve (L2-L3)

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17
Q

Origin of quadratus plantae?

A

Inferomedial surface of the calcaneus, lateral surface of calcaneal tuberosity

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18
Q

Insertion of quadratus plantae?

A

Tendon of flexor digitorum longus

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19
Q

Action of quadratus plantae?

A

Assists the flexor digitorum longus in flexion of the toes

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20
Q

Innervation of quadratus plantae?

A

Lateral plantar nerve (S1-S3)

21
Q

Origin of flexor hallucis brevis?

A

Medial cuneiform bone, lateral cuneiform bone, cuboid bone, medial side of the first metatarsal bone, plantar calcaneocuboid ligament

22
Q

Insertion of flexor hallucis brevis?

A

Lateral and medial aspects of base of proximal phalanx of great toe

23
Q

Action of flexor hallucis brevis?

A

Flexion at metatarsophalangeal joint 1, supports longitudinal arch of foot

24
Q

Innervation of flexor hallucis brevis?

A

Medial plantar nerve (S1-S2)

25
Q

Origin of flexor digiti minimi brevis?

A

Base of 5th metatarsal, long plantar ligament

26
Q

Insertion of flexor digiti minimi brevis?

A

Base of proximal 5th phalanx

27
Q

Action of flexor digiti minimi brevis?

A

Flexion at metatarsophalangeal joint 5

28
Q

Innervation of flexor digiti minimi brevis?

A

Lateral plantar nerve (S2-S3)

29
Q

Origin of adductor hallucis?

A

Oblique head: Bases of metatarsals 2-4, lateral cuneiform, cuboid tarsal, tendon of fibularis longus
Transverse head: Plantar metatarsophalangeal ligaments of toes 3-5, deep transverse metatarsal ligaments of toes 3-5

30
Q

Insertion of adductor hallucis?

A

Lateral aspect of base of proximal phalanx of great toe

31
Q

Action of adductor hallucis?

A

Adduction + flexion of metatarsophalangeal joint 1, supports the transverse and longitudinal arches of foot

32
Q

Innervation of adductor hallucis?

A

Lateral plantar nerve (S2-S3)

33
Q

Origin of the three plantar interossei?

A

Medial aspects of metatarsal bones 3-5

34
Q

Insertion of the three plantar interossei?

A

Medial bases of proximal phalanges and extensor expansion of digits 3-5

35
Q

Action of the three plantar interossei?

A

Flexion + adduction at metatarsophalangeal joints 3-5, extension at interphalangeal joints 3-5

36
Q

Innervation of the three plantar interossei?

A

Lateral plantar nerve (S2-S3)

37
Q

Origin of the four dorsal interossei?

A

Opposing sides of metatarsal bones 1-5

38
Q

Insertion of the four dorsal interossei?

A

1st dorsal interosseous: Medial base of proximal phalanx of second digit
2-4 dorsal interossei: Lateral bases of proximal phalanges and extensor expansion of digits 2-4

39
Q

Action of the four dorsal interossei?

A

Flexion + abduction at metatarsophalangeal joints 2-4, extension at interphalangeal joints 2-4

40
Q

Innervation of the four dorsal interossei?

A

Lateral plantar nerve (S2-S3)

41
Q

Origin of extensor hallucis brevis?

A

Superolateral aspect of the calcaneus

42
Q

Insertion of extensor hallucis brevis?

A

Proximal phalanx of great toe

43
Q

Action of extensor hallucis brevis?

A

Extension at metatarsophalangeal joint 1

44
Q

Innervation of extensor hallucis brevis?

A

Deep fibular/peroneal nerve (S1-S2)

45
Q

Origin of extensor digitorum brevis?

A

Superolateral surface of calcaneus, interosseous talocalcaneal ligament, stem of inferior extensor retinaculum

46
Q

Insertion of extensor digitorum brevis?

A

Extensor digitorum longus tendons of toes 2-5

47
Q

Action of extensor digitorum brevis?

A

Extension at distal interphalangeal joints 2-5

48
Q

Innervation of extensor digitorm brevis?

A

Lower limbs (7 decks)

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