Head bobbing due to succinic semialdehyde dehydrogenase deficiency

A 9-month-old boy had a short history of “yes-yes” head bobbing (video on the Neurology ® Web site at www.neurology.org). Mild global delay prompted investigation. Imaging (figure, A–C), biochemical, and molecular findings (table e-1) were consistent with succinic semialdehyde dehydrogenase …