Herpes zoster polyradiculopathy.

Herpes zoster infection, resulting from reactivation of the dormant varicella zoster virus in the dorsal root ganglia, usually causes a painful dermatomal vesicular rash. Rarely, associated peripheral motor weakness is present, the mechanism of which is unclear. Three patients are reported who had focal limb muscle weakness associated with zoster infection. Physical and occupational therapy played a key role in motor function recovery of the patients, yet emphasis on the rehabilitation of postherpetic motor weakness is lacking in the literature. Physiatrists evaluating patients with limb muscle weakness following herpes zoster infection should be alert to this condition. The clinical syndrome of herpes zoster radiculopathy and the rehabilitation of these patients are discussed.