Bobble-head doll syndrome (BHDS) is a rare neurological condition which causes involuntary ‘bobbing’ or repetitive anterior-posterior movement of the head, resembling that of a bobble-head doll.

Bobble-head doll syndrome is a rare and unique movement disorder, typically affecting children under five and commonly linked to cysts. The first clinical case was described in 1966 and there have ...

An 18-month-old girl who began to display “excessive head nodding” was suffering an extremely rare neurological disorder known as “bobblehead doll syndrome”, doctors found.