Head nodding associated with idiopathic childhood nystagmus.
D002648:Child; D005133:Eye Movements; D005403:Fixation, Ocular; D006801:Humans; D009039:Motion Perception / Q000502:physiology; D009043:Motor Activity / Q000502:physiology; D009759:Nystagmus, Pathologic / Q000175:diagnosis* / Q000503:physiopathology; D012018:Reflex / Q000502:physiology; D013239:Stereotyped Behavior / Q000502:physiology; D014202:Tremor / Q000503:physiopathology; D014722:Vestibule, Labyrinth / Q000503:physiopathology