Anterior and Lateral Leg

Question 1

Compartments of the Leg

Answer 1

Question 2

Interosseous Membrane

Answer 2

Provides a surface for muscle attachment

Fibres pass inferolaterally from Tibia to Fibula

Helps resist downward pull of muscles attached to the fibula

Question 3

Superior Tibiofibular Joint

Answer 3

Question 4

Anterior Compartment of Leg

Number of muscles?

What do they do?

Position of tendons?

Answer 4

4 muscles

Extensors of ankle joint and digits

Tendons are anterior to ankle joint

Question 5

Lateral Compartment of Leg

Number of muscles?

Function?

Tendon position?

Answer 5

2 muscles

Evertors of the foot

Tendons are posterior to lateral malleolus

Question 6

Lateral Compartment - Peroneus Longus

Attachments

Answer 6

Head and upper 2/3 of lateral fibula to the base of the 1st metatarsal and medial cuneiform

Question 7

Lateral Compartment - Peroneus Longus

Innervation

Answer 7

Superficial Peroneal Nerve

Question 8

Lateral Compartment - Peroneus Longus

Function

Answer 8

Evertor of the foot

Question 9

Lateral Compartment - Peroneus Brevis

Attachments

Answer 9

Inferion 2/3 of lateral fibula to the tuberosity on the lateral side of the base of the 5th metatarsal

Question 10

Lateral Compartment - Peroneus Brevis

Function

Answer 10

Evertor of foot

Question 11

Lateral Compartment - Peroneus Brevis

Innervation

Answer 11

Superficial Peroneal Nerve (L5, S1, S2)

Question 12

Distal Attachments of Lateral Compartment Muscles

Answer 12

Question 13

Anterior Compartment

Muscles

Answer 13

Tibialis Anterior

Extensor Digitorum Longus

Peroneus Tertius

Extensor Hallucis Longus

Question 14

Anterior Compartment

Innervation

Answer 14

All supplied by Deep Peroneal Nerve (L4, L5)

Question 15

Anterior Compartment - Tibialis Anterior

Attachments

Answer 15

Lateral condyle of tibia, superior 1/2 of lateral tibial surface and interosseous membrane to the medial and inferior surfaces of the medial cuneiform and base of 1st metatarsal

Question 16

Anterior Compartment - Tibialis Anterior

Innervation

Answer 16

Deep Peroneal Nerve (L4, L5)

Question 17

Anterior Compartment - Tibialis Anterior

Function

Answer 17

Dorsiflexes ankle and inverts foot

Question 18

Anterior Compartment - Extensor Digitorum Longus

Attachments

Answer 18

Lateral condyle of the tibia, the superior 3/4 of the medial surface of the fibula and the interosseous membrane to the middle and distal phalanges of the lateral 4 digits

Question 19

Anterior Compartment - Extensor Digitorum Longus

Innervation

Answer 19

Deep Peroneal Nerve (L4, L5)

Question 20

Anterior Compartment - Extensor Digitorum Longus

Function

Answer 20

Extends lateral 4 digits and dorsiflexes the ankle

Question 21

Anterior Compartment - Peroneus Tertius

Attachments

Answer 21

Inferior 1/3 of the anterior fibula and the interosseous membrane to the dorsum of the base of the 5th metatarsal

Question 22

Anterior Compartment - Peroneus Tertius

Innervation

Answer 22

Deep Peroneal Nerve (L4, L5)

Question 23

Anterior Compartment - Peroneus Tertius

Function

Answer 23

Dorsiflexes the ankle and assists in eversion of the foot

Question 24

Anterior Compartment - Extensor Hallucis Longus

Attachments

Answer 24

Middle anterior surface of the fibula and the interosseous membrane to the dorsal aspect of the distal phalanx of the hallux

Question 25

Anterior Compartment - Extensor Hallucis Longus

Innervation

Answer 25

Deep Peroneal Nerve (L4, L5)

Question 26

Anterior Compartment - Extensor Hallucis Longus

Function

Answer 26

Extends the Hallux and Dorsiflexes the ankle

Question 27

Extensor Retinacula - Superior Extensor Retinaculum

Attachment

Answer 27

Anterior border of the tibia to the lower end of the fibula

Question 28

Extensor Retinacula - Inferior Extensor Retinaculum

Attachment (3)

Answer 28

Y shaped so has 3

Stem: Attached to calcaneous laterally

Upper limb: Attached to medial malleolus

Lower Limb: Passes around medial border of foot and blends with dense fascia over abductor hallucis

Question 29

Muscles of the Dorsum of the Foot

Attachments (EHB and EDB)

Answer 29

Both: Superior surface of calcaneous and the inferior extensor retinaculum

EHB: Base of proximal phalanx of hallux

EDB: Long extensor tendons of toes 2-4

Question 30

Muscles of the Dorsum of the Foot

Innervation

Answer 30

Deep peroneal nerve (L5/S1)

Question 31

Nerves of the Leg

Answer 31

Question 32

Superficial Peroneal Nerve

Branch of?

Answer 32

Common peroneal between peroneus longus and neck of fibula

Question 33

Superficial Peroneal Nerve

Supplies?

Answer 33

Lateral compartment of leg to muscles, before continuing as cutaneous nerve and innervating distal anteror surface of leg and most of dorsum of foot

Question 34

Deep Peroneal Nerve

Branch of?

Answer 34

Common peroneal between peroneus longus and neck of fibula

Question 35

Deep Peroneal Nerve

Supply

Answer 35

Passes through EDL and travels with anterior tibial artery supply all anterior compartment muscles. Crosses ankle joint to supply EDB and EHB. Cutaneous innervation to skin between digits 1 and 2.

Question 36

Cutaneous Innervation of Anterior and Lateral Leg

Answer 36

Question 37

Arteries of the Leg

Branches of Poplitieal, Anterior tibial and Posterior tibial arteries

Answer 37

Popliteal gives anterior and posterior tibial

Anterior tibial goes through the interosseous membrane and descends on it

Posterior tibial gives the fibular artery that provides perforating branches to the lateral compartment

Question 38

Arteries of the Dorsum of the Foot

Dorsalis Pedis branches

Answer 38

Continuation of Anterior Tibial

Gives lateral tarsal, deep plantar and arcuate arteries

Arcuate runs across metatarsals to anastomose with lateral tarsal