What movement disorder is most commonly associated with post-varicella infection?

Ataxia is the most commonly associated movement disorder with post-varicella infection, particularly following a case of chickenpox (varicella). This condition arises as a result of inflammation in the central nervous system, which can occur after a viral infection like varicella. The ataxia experienced is often characterized by unsteady movements and difficulties with coordination, reflecting how the virus may affect motor function.

Children who have had varicella can develop this post-infectious complication, potentially due to immune-mediated mechanisms that affect cerebellar function. Symptoms in these cases can include difficulty walking, imbalance, and in some cases, tremors.

While other movement disorders can occur in association with various infections or different types of neurological conditions, ataxia stands out as the primary movement disorder linked specifically to post-varicella infection. Other options, such as spastic diplegia, Sydenham chorea, and myoclonus, do not have the same direct and established correlation with the varicella virus.