| Circadian rhythms in handwriting kinematics and legibility. | |
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MedLine Citation:
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PMID: 20579758 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The aim of the present study was to analyze the circadian rhythmicity in handwriting kinematics and legibility and to compare the performance between Dutch and German writers. Two subject groups underwent a 40 h sleep deprivation protocol under Constant Routine conditions either in Groningen (10 Dutch subjects) or in Berlin (9 German subjects). Both groups wrote every 3h a test sentence of similar structure in their native language. Kinematic handwriting performance was assessed with a digitizing tablet and evaluated by writing speed, writing fluency, and script size. Writing speed (frequency of strokes and average velocity) revealed a clear circadian rhythm, with a parallel decline during night and a minimum around 3:00 h in the morning for both groups. Script size and movement fluency did not vary with time of day in neither group. Legibility of handwriting was evaluated by intra-individually ranking handwriting specimens of the 13 sessions by 10 German and 10 Dutch raters. Whereas legibility ratings of the German handwriting specimens deteriorated during night in parallel with slower writing speed, legibility of the Dutch handwriting deteriorated not until the next morning. In conclusion, the circadian rhythm of handwriting kinematics seems to be independent of script language at least among the two tested western countries. Moreover, handwriting legibility is also subject to a circadian rhythm which, however, seems to be influenced by variations in the assessment protocol. |
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Authors:
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Isabelle Jasper; Marijke Gordijn; Andreas Häussler; Joachim Hermsdörfer |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-06-25 |
Journal Detail:
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Title: Human movement science Volume: 30 ISSN: 1872-7646 ISO Abbreviation: Hum Mov Sci Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-07-04 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8300127 Medline TA: Hum Mov Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 818-29 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Clinical Neuropsychology Research Group (EKN), Clinic for Neuropsychology, München-Bogenhausen Hospital, Dachauer Strasse 164, D-80992 Munich, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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