Bilateral stereotypy after unilateral cerebellar infarction
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Stereotypy is defined as repetitive and continuous non-goal-directed movement. It was reported in association with various disorders including developmental delay, autism, schizophrenia, tardive dyskinesia, and frontotemporal dementia. There were few cases with stereotypy secondary to cerebral infarctions in the putamen or cerebellum .
Here, we report a case with bilateral hand stereotypy after left cerebellar infarction.
An 82-year-old man was admitted to the hospital with acute onset dysarthria and gait disturbance. He was hypertensive and had a 60 pack-year smoking history. A neurological examination showed normal cognition (the Mini-Mental State Examination score = 25), dysmetria, and gait ataxia. Brain magnetic resonance imaging (MRI) showed an acute infarction in the left cerebellar hemisphere (Fig. 1a). He was treated with aspirin and clopidogrel, and discharged with only minimal residual symptoms.
Magnetic resonance imaging
18F-fluorinated N-3-fluoropropyl-2-beta-carboxymethoxy-3-beta-(4-iodophenyl) nortropane
Positron emission tomography
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no competing interest.
Ethical approval is waived for this study, because this is a retrospective report of a case.
Informed consent about the use of medical record and video was taken from the patient.
Supplemental video. The patient continuously rubs his thumbs against the index fingers. The repetitive and patterned movements are temporarily interrupted by other activities. The informed consent for the supplemental video was received from the patient. (WMV 11018 KB)
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