Fractured diaphyseal tibiofibular synostosis in an adolescent soccer player.

Diaphyseal tibiofibular synostosis is a rare cause of symptomatic shin pain with exertion. In this case, a 14-year-old male soccer player presented with atraumatic right shin pain made worse with running. Computed tomography revealed heterotopic ossification, or synostosis, of the tibial-fibular syndesmosis.

Positive sharp wave origin: evidence supporting the electrode initiation hypothesis.

This investigation analyzes the temporal characteristics of maximal depolarization times for three waveforms: end-plate spikes, fibrillation potentials, and positive sharp waves (PSWs) to provide support for the electrode initiation hypothesis of PSW induction. The maximal depolarization times for PSWs are documented to comprise two distinct populations conforming to relatively short and comparatively longer maximal depolarization times. Those PSWs with short maximal depolarization times were found to be equivalent to end-plate spike maximal depolarization times, whereas those with longer times were comparable to fibrillation potentials.