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Retract the deep group of muscles of the posterior compartment and identify the arteries of this compartment. The popliteal artery [probe; retractor holds the tibial nerve] ends at the inferior border of the popliteus muscle by dividing into the anterior and posterior tibial arteries.The anterior tibial artery [probe; retractor holds the tibial nerve, tibial vein, and plantaris tendon] passes anteriorly through the interosseous membrane [the tip of the probe passes into the opening of the interosseous membrane] to reach the anterior compartment of the leg. Its course and branches are described in Step 5.
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