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Anatomy Exam 3 > Anterior and Lateral leg, Dorsal foot > Flashcards

Anterior and Lateral leg, Dorsal foot Flashcards

1
Q

Motor innervation of anterior leg

A

Deep fibular n.

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2
Q

Arterial and venous blood supply to anterior leg?

A

Anterior tibial artery and vein

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3
Q

Cutaneous innervation to anterior leg

A

Saphenous n. (from femoral n.

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4
Q

Motor innervation of lateral leg

A

Superficial fibular n.

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5
Q

Arterial and venous blood suppy to latera leg

A

Posterior tibial and fibular artery and vein

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6
Q

Cutaneous innervation to lateral leg

A

Common fibular n.

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7
Q

Origin and insertion of tibialis anterior

A

O: lateral condyl; lateral surface of tibia and interosseous membrane

I: Medial cuneiform, base of metatarsal 1

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8
Q

Innervation and action of tibialis anterior

A

N: Deep fibular n.

A: Dorsiflexes and inverts the foot

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9
Q

What mucsles’s tendon passes anterior to medial malleolus

A

tibialis anterior

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10
Q

Origin and insertion of Extensor Hallucis Longus

A

O: Anterior fibula and interosseous membrane

I: Base of distal phalanx of hallux (digit 1)

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11
Q

Innervation and action of extensor hallucis longus

A

N: deep fibular n

A: dorsiflexes ankle and extends hallux

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12
Q

Origin and insertion of extensor digitorum longus

A

O: lateral condyle of tibia, proximal 2/3 anterior fibula and interosseous membrane

I: middle and distal phalanges of phalanges 2-5 (extensor expansion)

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13
Q

Innervation and action of extensor digitorum longus

A

N: deep fibular n

A: dorsiflexes foot and extends lateral 4 toes

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14
Q

Identify

A

Extensor expansion

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15
Q

What is the origin and insertion of fibularis tertius

A

O: Inferior 1/3 anterior fibula and interosseous membrane

I: Base of metatarsal 5

*Proximally it is fuse with extensor digitorum longus but seperates distally

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16
Q

What tendons from the anterior leg muscles are seen on the foot?

A
  • Most medial: Tibialis anterior
  • Extensor hallucis longus
  • (4) extendor digitorum longus
  • Fibularis tertius
17
Q

Medial to the tendon of extensor hallucis longus, you can palpate the pulse from which artery?

A

Dorsalis pedis a.

18
Q

What is the origin and insertion of fibularis longus

A

O: head/superior 2/3 of lateral fibula

I: base of metatarsal 1 and medial cuneiform

19
Q

What is the innervation and action of fibularis longus

A

N: superficial fibular n.

A: Everts foot

20
Q

What is the origin and insertion of fibularis brevis

A

O: Inferior 2/3 of lateral fibula

I: tuberosity at base of metatarsal 5

21
Q

What is the innervation and action of fibularlis brevis

A

N: superficial fibular n

A: everts foot

22
Q

What 3 muscles are responsible for eversion

A
  • Fibularis longus
  • Fibularis brevis
  • Fibularis tertius
23
Q

What 2 muscles are responsible for inversion of the foot

A
  • tibialis posterior
  • tibialis anterior
24
Q

What 2 muscles (one from anterior and one from lateral leg) give support of longitudinal arches

A

Tibialis anterior

Fibularis longus

25
Q

What muscle of the lateral leg gives support to the transverse arch of the foot

A

fibularis longus tendon

26
Q

Pes planus

A
  • flatfoot
  • flexible flatfoot
  • medial arch absent while weight bearing
  • inadequate passive arch support
27
Q

Origin and insertion of extensor digitorum brevis

A

O: dorsal surface of calcaneous

I: EDL tendons of toes 2-44

28
Q

Innervation and action of extensor digitorum brevis

A

I: deep fibular n

A: Aids EDL in extending toes 2-5

29
Q

What is the origin and insertion of extensor hallucis brevis

A

O: dorsal surface of calcaneous

I: base of proximal phalanx 1 (hallux)

30
Q

What is the innervation and action of extensor hallucis brevis

A

N: Deep fibular n

A: aids EHL in extending hallux

Anatomy Exam 3 (9 decks)

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