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Comment & Response
February 2016

Clonic Perseveration vs Stereotypy Phenomenology

Author Affiliations
  • 1Department of Neurology, E-DA Hospital/I-Shou University, Kaohsiung City, Taiwan
  • 2Blacktown Hospital and Clinical School, University of Western Sydney, Sydney, New South Wales, Australia
  • 3Movement Disorders Unit, Department of Neurology, Westmead Hospital and Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
JAMA Neurol. 2016;73(2):241. doi:10.1001/jamaneurol.2015.3921

To the Editor We read with interest the report by Pandey and Sarma1 of a patient with an acute left thalamic infarction who developed seemingly purposeless tapping movements in the right hand. In the accompanying video, the movement on day 6 was confined to the right hand, with wrist flexion extension at 4 to 5 Hz and index finger extension.1 On day 10, the movement progressed to include wrist flexion extension, elbow flexion extension, and shoulder internal-external rotation. On day 21, with reduced severity, the movement was again of wrist flexion extension. On day 28, the movement was limited to fingers flexion. At 1-month follow-up, the movement was mild but seemed to be triggered by right index finger extension.

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