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Deep Posterior Compartment

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Discussion

  • contains tibialis posterior, FDL, & FHL;
  • originates primarily from posterior tibia, fibula, & interosseous membrane in proximal 2/3 of leg, these structures are involved in plantar flexion of foot & toes & inversion of foot thru tibialis posterior msucle function;
  • major neurologic structure is posterior tibial nerve;
  • 2 major arteries, peroneal artery & posterior tibial arteries, are present in this compartment;
    • posterior tibial art, because of its protected nature, frequently is major arterial supply after significant open frx & is a potential source for anastomosis
      • w/  free flaps for soft tissue recontruction of the leg;

Compartment Syndrome

  • clawing of the toes, a common sequela of posttraumatic compartment syndrome within the deep posterior compartment following a distal third tibia fracture;
  • this may be due to the potential communication between the deep posterior compartment and the compartments of the foot