Lateral Compartment of the Leg and Medial Side of the leg Flashcards

1
Q

[10-minute video]: Anatomy of the Common Peroneal nerve, Superficial Peroneal nerve, Deep Peroneal nerve

A

😎

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2
Q

State the points of attachment of the superior fibular retinaculum.

A

Anteriorly: The posterior aspect of the lateral malleolus

Posteriorly: Lateral aspect of the calcaneus and deep fascia of the leg
[Diagram]

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3
Q

Describe the origin of fibularis longus (3).

A
  1. upper 2/3 of the lateral surface of the fibula
  2. head of fibula
  3. anterior and posterior intermuscular septae of the leg
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4
Q

Where does fibularis longus insert?

A

Inferolateral surface of the base of the first metatarsal bone and the adjoining surface of the medial cuneiform bone.

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5
Q

Which muscle is the chief evertor of the foot?

A

Fibularis longus

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6
Q

Which is the main nerve that innervates the lateral compartment of the leg? State its root values and whether the nerve fibres arise from ventral rami or dorsal rami.

A
  1. Superficial fibular nerve
  2. L5, S1
  3. It arises from primary ventral rami
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7
Q

State 3 functions of fibularis longus.

A
  1. It is the chief evertor of the foot. [Diagram: eversion and inversion]
  2. It maintains the lateral longitudinal and transverse longitudinal arches of the foot.
  3. It is a weak plantar flexor of the foot.
  4. [Diagram: fibularis longus and tibialis anterior]
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8
Q

State the four boundaries of the lateral compartment of the leg.

A

Anteriorly: anterior intermuscular septum
Posteriorly: posterior intermuscular septum
Medially: lateral surface of the fibula
Laterally: deep fascia of the leg

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9
Q

Describe the origin of fibularis brevis (2).

A
  1. Lower 2/3 of the lateral surface of the shaft of the fibula.
  2. The anterior and posterior intermuscular septa of the leg.
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10
Q

State the insertion of fibularis brevis.

A

It inserts on the lateral side of the base of the fifth metatarsal bone.
Alternatively: It inserts on the tubercle of the 5th metatarsal

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11
Q

State two functions of fibularis brevis.

A
  1. Eversion of the foot
  2. Weak plantar flexor of the foot
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12
Q

Name the nerve that supplies the skin of the medial side of the big toe.

A

The medial terminal branch of the superificial fibular nerve

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13
Q

Which nerve supplies the skin of the second interdigital cleft of the foot.

A

The medial terminal branch of the superficial fibular nerve

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14
Q

Which nerve supplies the skin of the third and fourth interdigital clefts of the foot.

A

The lateral terminal branch of the superficial fibular nerve

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15
Q

Name the bursa that separates the tendons of sartorius, gracilis and semitendinosus at their point of attachments on the tibia.

A

Anserine bursa

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16
Q

Which is the main artery of the lateral compartment of the leg, and from which artery does it branch?

A
  1. Fibular artery
  2. It branches from the posterior tibial artery
17
Q

Describe the venous drainage of the leg (6 marks).

A

Superficial veins (3 marks)
β˜‘ Great saphenous vein on the medial aspect, terminates into the femoral vein
β˜‘ Small saphenous vein on the lateral aspect, terminates into the popliteal vein
β˜‘ Superficial veins connect to deep veins via perforators

Deep veins (3 marks)
β˜‘ Anterior tibial venae commitantes drain the anterior compartment
β˜‘ Posterior tibial venae commitantes drain the posterior and lateral compartments
β˜‘ Both join to form the popliteal vein

18
Q

Where can the pulse of the posterior tibial artery be palpated?

A

inferoposteriorly to the medial malleolus
[Diagram]