Albany Medical College Virtual Anatomy Lab

Lab 7 - Module 3 - Popliteal Fossa: Page 5 of 5

Case Report Conclusion:

Diagnosis is Chronic Exertional Compartment Syndrome of the deep posterior compartment. The deep posterior compartment is small and bound anteriorly by the two leg bones and interosseous membrane and posteriorly by the transverse intermuscular septum. Both boundaries are rigid. Any increase in muscle size may cause a compartment type syndrome. When exercising increase blood flow to the muscle increases the volume of the muscle thereby decreasing the volume of the compartment.

Recall that the tibial nerve runs within the transverse intermuscular septum. When the compartment contents increase volume, it compresses the tibial nerve resulting in the symptoms reported by our patient.

Why does the pain, numbness, etc. resolve upon cessation of exercise?