The Journal of Bone and Joint Surgery, Vol 74, Issue 8 1180-1185, Copyright © 1992 by Journal of Bone and Joint Surgery, Inc
Palsy of the deep peroneal nerve after proximal tibial osteotomy. An anatomical study
A Kirgis and S Albrecht
Department of Anatomy, Ev. Waldkrankenhaus Spandau, Teaching Hospital, Free University of Berlin--Medical School, Federal Republic of Germany.
Iatrogenic, isolated weakness or paralysis of the extensor hallucis longus
muscle is a common complication in patients who have had a proximal tibial
and fibular osteotomy. To investigate why this complication occurs, we
dissected the deep peroneal nerve and neighboring structures, such as the
tibia and fibula and the muscles of the leg, in twenty-nine specimens from
cadavera, paying special attention to the motor branches supplying the
extensor hallucis longus. Of forty-six motor nerves that were identified,
eight entered the muscle from the lateral side in an area seventy to 150
millimeters distal to the fibular head; all of them ran close to the
fibular periosteum. We suggest that, in some patients, the nerve supply to
the extensor hallucis longus is at high risk for injury during a tibial
osteotomy because of the proximity of the bone to the motor branches.