Delayed onset limb dystonia following electric injury.

It has been recognized that head trauma can induce movement disorders including tremor, dystonia, parkinsonism and tics. Likewise, lesions involving the peripheral nervous system have been held responsible for such extrapyramidal manifestations, However, involuntary movements secondary to electric injury have seldom been described. Here we report a patient who developed limb dystonia 6 years after receiving an electric discharge in the ipsilateral limb. Although imaging and laboratory studies failed to ascribe the lesion either to the central or peripheral nervous system, initial symptoms such as local bruises, edema and pain would favor peripheral damage. Botulinum toxin injections markedly improved dystonia. Analysis of cases of dystonia following electric injury reported to date suggest that: (a) dystonia may be expected to develop immediately or even years after the electric insult; (b) dystonia usually develops in or adjacent to the area initially injured; (c) dystonia remains limited to a distinct body segment; (d) severity of dystonia as well as the interval between injury and the onset of the movement disorder fails to correlate with trauma severity; (e) no evidence supports the hypothesis that previous history of movement disorders or neuroleptic exposure are predisposing factors; and (f) botulinum toxic provides symptomatic relief.