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Clinical Exam Prep > Muscle Actions and Origin/Insertions > Flashcards

Muscle Actions and Origin/Insertions Flashcards

1
Q

What is the origin and insertion of the abductor digiti minimi?

A

Originates at the calcaneal tuberosity, and inserts on the base of the 5th proximal phalanx

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2
Q

What’s the action of abductor digiti minimi?

A

Abduction and flexion of the 5th

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3
Q

What is the origin and insertion of abductor hallucis?

A

Originates on medial side of calcaneal tuberosity, and inserts on the base of the proximal phalanx of the hallux

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4
Q

What is the action of abductor hallucis?

A

Flexion and abduction of the hallux

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5
Q

What is the origin and insertion of extensor digitorum brevis?

A

Originates on the superolateral surface of the calcaneus, and inserts on the bases of the middle phalanges 1-4

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6
Q

What is the action of extensor digitorum brevis?

A

Toe extension at MTP joints

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7
Q

What is the origin and insertion of extensor digitorum longus?

A

Originates on the lateral tibial condyle and the proximal 3/4 of the fibula, inserts on the middle and distal phalanges of 2-5

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8
Q

What is the action of extensor digitorum longus?

A

Prime toe extensor, as well as dorsiflexion of the ankle and eversion

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9
Q

What is the origin and insertion of extensor hallucis longus?

A

Originates on the medial fibula and interosseous membrane, and inserts on the dorsal distal phalanx of the big toe

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10
Q

What is the action of extensor hallucis longus?

A

Dorsiflexion of the hallux, dorsiflexion of the ankle, and inversion of the ankle

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11
Q

What is the origin and insertion of fibularis tertius?

A

Originates on the distal 1/3 of the medial fibula and the anterior surface of the interosseous membrane, and inserts on the proximal medial surface of the base of the 5th MT

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12
Q

What is the action of fibularis tertius?

A

Dorsiflexion of the ankle, eversion of the foot

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13
Q

What is the origin and insertion of flexor digitorum brevis?

A

Originates on the calcaneal tuberosity, and inserts on the middle phalanx of digits 2-5

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14
Q

What is the action of flexor digitorum brevis?

A

Aids in toe flexion

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15
Q

What is the origin and insertion of flexor digitorum longus?

A

Originates on the posterior tibia, and inserts on the bases of the distal phalanges of digits 2-5

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16
Q

What is the action flexor digitorum longus?

A

Plantar flexion, inversion, and flexion of MTPJ and IPJ 2-5

17
Q

What is the origin and insertion of flexor digiti minimi brevis?

A

Originates on the base of the 5th MT, and inserts on the base of the proximal phalanx of the 5th digit

18
Q

What is the action of flexor digiti minimi brevis?

A

Flexion of the 5th toe at the MTPJ

19
Q

What is the origin and insertion of flexor hallucis brevis?

A

Originates on the inferior midfoot (cuboid bone/lateral cuneiform), and inserts via two tendons on both sides of the base of the 1st proximal phalanx. Each tendon has a sesamoid

20
Q

What is the action of flexor hallucis brevis?

A

Flexion of 1st MTPJ

21
Q

What is the origin and insertion of peroneus brevis?

A

Originates on the distal fibula, wraps posterior to the lateral malleolus and inserts on the proximal end of the 5th MT

22
Q

What is the action of peroneus brevis?

A

Plantar flexion and eversion of the foot

23
Q

What is the origin and insertion of peroneus longus?

A

Originates on the lateral surface of the proximal fibula, and inserts on the plantar surface of the medial cuneiform and base of the 1st MT

24
Q

What is the origin and insertion of tibialis anterior?

A

Originates on the lateral tibial condyle, and inserts into the inferior surface of the medial cuneiform and 1st MT bone

25
Q

What is the action of tibialis anterior?

A

Prime dorsiflexor of the foot, inverts the foot as well

26
Q

What is the origin and insertion of tibialis posterior?

A

Originates on the interosseous membrane/ adjcent walls of tibia/fibula, and inserts on the navicular tuberosity, medial cuneiform, and base of MT 2-3

27
Q

What is the action of tibialis posterior?

A

Prime inverter of the foot, aids in plantar flexion as well

Clinical Exam Prep (18 decks)

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