Document Detail

Impairment of rapid repetitive finger movements and visual reaction time in patients with essential tremor.
MedLine Citation:
PMID:  19765055     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: The question whether patients with essential tremor (ET) have slowed movements as part of their clinical manifestations is still a matter of controversy. We analyzed basic motor function in patients with ET and in healthy matched controls. METHODS: We studied 61 patients with ET and 122 age- and sex-matched controls. Evaluation included four timed tests (pronation-supination, finger tapping and movement between two points, all with both hands, and walking test); and three tests performed on a personal computer (speed for pressing repetitively a key - frequency, visual reaction time and movement time, all with both hands). RESULTS: Essential tremor patients showed higher mean values for right and left finger tapping, left movement between two points; and with right and left frequency and reaction time. In the logistic regression study, ET patients showed significantly higher values than controls for right and left finger tapping; mean, SD, maximum and rank values of right and left frequency; and mean, SD, minimum, maximum and rank values of right and left visual reaction time. Tremor severity was not correlated with the altered values. CONCLUSIONS: Patients with ET showed impaired motor performance, at least in some tasks, such as rapid repetitive finger movements (finger tapping and frequency) and visual reaction time (impairment was not related with tremor severity). This probably means that patients with ET have some degree of bradykinesia.
F J Jiménez-Jiménez; L Rubio; H Alonso-Navarro; M Calleja; B Pilo-de-la-Fuente; J F Plaza-Nieto; J Benito-León; P J García-Ruiz; J A G Agúndez
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-09-17
Journal Detail:
Title:  European journal of neurology : the official journal of the European Federation of Neurological Societies     Volume:  17     ISSN:  1468-1331     ISO Abbreviation:  Eur. J. Neurol.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-05-11     Completed Date:  2010-08-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9506311     Medline TA:  Eur J Neurol     Country:  England    
Other Details:
Languages:  eng     Pagination:  152-9     Citation Subset:  IM    
Section of Neurology, Hospital del Sureste, Arganda del Rey (Madrid), Spain.
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MeSH Terms
Central Nervous System / physiopathology
Disability Evaluation
Efferent Pathways / physiopathology
Essential Tremor / complications,  diagnosis*,  physiopathology*
Fingers / innervation,  physiology*
Hypokinesia / diagnosis,  etiology,  physiopathology
Middle Aged
Motor Skills / physiology*
Movement Disorders / diagnosis*,  etiology,  physiopathology*
Muscle, Skeletal / innervation,  physiopathology
Neurologic Examination
Psychomotor Performance / physiology
Reaction Time / physiology
Task Performance and Analysis
Time Factors
Visual Perception / physiology
Comment In:
Eur J Neurol. 2010 Jan;17(1):3-4   [PMID:  19845748 ]

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