Practical Class 5: Leg Flashcards

1
Q

What is acute osteomyelitis?

A

Infection and inflammation of the bone or bone marrow.

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2
Q

What is a compound injury?

A

In injury involving an open fracture.

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3
Q

What are the two foramina found in the introsseous membrane in the leg?

A
  • Aperture for anterior tibial vessels

- Aperture for perforating branch of fibular artery

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4
Q

What is the function of a retinaculum?

A

A band around tendons that holds them in place. It is not part of any muscle. Its function is mostly to stabilize a tendon.

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5
Q

What are the attachments of tibialis anterior?

A

Origin: Lateral surface of tibia and adjacent interosseous membrane

Insertion: Medial and inferior surfaces of medial cuneiform and adjacent surfaces on base of metatarsal I

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6
Q

What movements may be produced at the ankle joint by contraction of tibialis anterior?

A

Dorsiflexion of foot at ankle joint.

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7
Q

Does tibialis anterior assist in inversion or eversion of the foot?

A

Inversion

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8
Q

What are the basic differences between extrinsic and intrinsic muscles?

A

Extrinsic muscles - have origins in the leg but insertions in the foot.

Intrinsic - have both their origins and insertions in the foot

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9
Q

What is the function of fibularis tertius?

A

Works with the extensor digitorum longus to dorsiflex, evert and abduct the foot.

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10
Q

From which artery does the anterior tibial artery arise?

A

The popliteal artery

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11
Q

How does the anterior tibial artery get from the posterior to the anterior compartment of the leg?

A

A hiatus in the introsseous membrane.

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12
Q

Which nerve innervates the anterior compartment of the leg.

A

Deep fibular nerve

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13
Q

Name the two muscles in the lateral compartment of the leg?

A

Fibularis longus

Fibularis brevis

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14
Q

Which bony prominence do the tendons of the fibular muscles pass posteriorly?

A

Lateral malleolus

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15
Q

What is the insertion of the fibularis longus?

A

Plantar posterolateral aspect of medial cuneiform and lateral side of 1st metatarsal base.

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16
Q

What are the actions of fibularis longus and brevis?

A

Longus - Everts foot and plantar flexes ankle; also helps to support the transverse arch of the foot

Brevis - Everts foot and plantar flexes ankle

17
Q

What is the innervation of the muscles of the lateral compartment?

A

Superficial fibular nerve

18
Q

What are the consequences of injuring the common fibular nerve?

A

Damage to this nerve typically results in foot drop, where dorsiflexion of the foot is compromised and the foot drags (the toe points) during walking; and in sensory loss to the dorsal surface of the foot and portions of the anterior, lower-lateral leg.

19
Q

What is the origin of popliteus?

A

Lateral femoral condyle

20
Q

What is the insertion of popliteus?

A

Posterior surface of proximal tibia

21
Q

What is the action of popliteus?

A

Stabilizes knee joint (resists lateral rotation of tibia on femur)
Unlocks knee joint (laterally rotates femur on fixed tibia)

22
Q

What is the origin of flexor digitorum longus?

A

Medial side of posterior surface of the tibia

23
Q

What is the insertion of flexor digitorum longus?

A

Plantar surfaces of bases of distal phalanges of the lateral four toes.

24
Q

What is the action of flexor digitorum longus?

A

Flexes lateral four toes

25
Q

What is the origin of flexor hallucis longus?

A

Posterior surface of fibula and adjacent interosseous membrane

26
Q

What is the insertion of flexor hallucis longus?

A

Plantar surface of distal phalanx of great toe

27
Q

What is the action of flexor hallucis longus

A

Flexes great toe

28
Q

What is the origin of tibialis posterior?

A

Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula

29
Q

What is the insertion of tibialis posterior?

A

Mainly to tuberosity of navicular and adjacent region of medial cuneiform.

30
Q

What is the action of tibialis posterior?

A

Inversion and plantarflexion of foot; support of medial arch of foot during walking

31
Q

How do you remember the arrangement of tendons at the medial malleolus?

A

Tom, Dick and Nervous Harry i.e.:

Tibialis posterior (Tom)
flexor Digitorum longus (Dick)
Neurovascular bundle (Nervous)
flexor Hallucis longus (Harry)