Vitamin-Responsive Movement Disorders in Children.

Movement disorders in childhood comprise a heterogeneous group of conditions that lead to impairment of voluntary movement, abnormal postures, or inserted involuntary movements. Movement disorders in children are frequently caused by metabolic disorders, both inherited and acquired. Many of these respond to vitamin supplementation. Examples include infantile tremor syndrome, biotinidase deficiency, biotin-thiamine-responsive basal ganglia disease, pyruvate dehydrogenase deficiency, aromatic amino acid decarboxylase deficiency, ataxia with vitamin E deficiency, abetalipoproteinemia, cerebral folate deficiency, and cobalamin metabolism defects. Recognition of these disorders by pediatricians and neurologists is imperative as they are easily treated by vitamin supplementation. In this review, we discuss vitamin-responsive movement disorders in children.