Head tremor Abnormal head movements Head titubation A head tremor of moderate speed (3 to 4 Hz) in the anterior-posterior direction. Titubation often accompanies midline cerebellar lesions. The 3-4 per second frequency of titubation is faster than the head nodding/bobbing that can be seen with thalamic lesions. The original description of head titubation in 1899 by Gowers (see PMID:4821687) was: As the disease progresses, some jerky irregularity develops in the movement of the neck and head so that the head presents slight movements, sometimes like an irregular tremor, sometimes simulating chorea. HP:0002599 UMLS:C1608410 Titubation