I.C.3 Leg & Foot: Anterior & Lateral Leg, Dorsal Foot: Page 1 of 3

Objectives:

3.3.1 Identify and give the actions for the muscles in the lateral compartment of the leg.

3.3.2 Identify and give the actions for the muscles in the anterior compartment of the leg and the dorsum of the foot.

3.3.3 Identify and give the actions for the muscles in the superficial posterior compartment of the leg.

3.3.4 Identify the major superficial veins draining the lower extremity.

3.3.5 Trace the course of lymphatic drainage of the foot and leg; indicating locations of major aggregations of lymph nodes.

Assigned Readings:

Moore's COA: 746-759, 769-783. See blue boxes on pages 763-767 for clinical correlation. See yellow boxes on pages 767-768 for "The Bottom Line."

Step 1: Begin with a lateral view of the leg and foot.

We will examine the remaining comparments of the leg sequentially. Remember to rotate the cadaver to follow the course of the muscles and tendons.

Lateral compartment of the leg:

Step 2: Add the fibularis longus, brevis, and tertius which evert the foot and strengthen the arch of the foot. These also assist in plantar flextion of the foot.

Anterior compartment of the leg:

	Step 3: Add the extensor hallucis longus, which extend the great toe and assist in dorsiflexion of the foot.
	Step 4: Add the extensor digitorum longus, which assists with extension of the lateral four toes and dorsiflexion of the foot.
	Step 5: Add the tibialis anterior, which assists with dorsiflexion of the foot and ankle, inversion of the foot, and provides medial arch support.

Muscles of the dorsum of the foot:

	Step 6: Add the extensor hallucis brevis, which assists with extending the great toe.
	Step 7: Add the extensor digitorum brevis, which assists with extending the lateral four toes of the foot.