OINA: Legs (Anterior)

Question 1

Popliteal Fossa content

Answer 1

Popliteal vessels

Small saphenous vein

Common peroneal nerve

Tibial nerve

Posterior cutaneous nerve of thigh

Genicular branch of obturator nerve

Connective tissues

Lymph nodes

Question 2

Contents of the anterior fascial compartment of the leg

Answer 2

Muscles: Tibialis anterior, extensor digitorum longus, peroneus tertius, and extensor hallucis longus

Blood Supply: Anterior tibial artery

Nerve Supply: Deep peroneal nerve

Question 3

Tibialis anterior

Answer 3

O: Lateral surface of shaft of tibia and interosseous membrane

I: Medial cuneiform and base of 1st metatarsal bone

N: Deep peroneal nerve L4,L5

A: Extends foot at ankle joint;inverts foot at subtalar and transverse tarsal joints, holds up medial longitudinal arch of foot

Question 4

Extensor Digitorum Longus

Answer 4

O: Anterior surface of shaft of fibula

I: Extensor expension of lateral four toes

N: Deep peroneal nerve L5,S1

A: Extends toes, extend foot at ankle joint

Question 5

Peroneus Tertius

Answer 5

O: Anterior surface of shaft of fibula

I: Base of 5th metacarpal bone

N: Deep peroneal nerve L5, S1

A: Extends foot at ankle jt, Everts foot at subtalar and transverse tarsal joints

Question 6

Extensor Hallucis Longus

Answer 6

O: Anterior surface of fibula

I: Base of distal phalanx of great toe

N: Deep peroneal nerve L5, S1

A: Extends big toe, extends foot at ankle joint, inverts foot at subtalar, and transverse tarsal joints

Question 7

Extensor Digitorum brevis

Answer 7

O: Calcaneus

I: By four tendons into the proximal phalanx of big toe and long extensor tendons to 2nd, 3rd, 4th toes

N: Deep peroneal nerve S1, S2

A: Extends toes