The Effect of Visual Feedback on Writing Size in Parkinson’s Disease
Joint Authors
Potgieser, Adriaan R. E.
Roosma, Elizabeth
Beudel, Martijn
de Jong, Bauke M.
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-4, 4 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-06-17
Country of Publication
Egypt
No. of Pages
4
Main Subjects
Abstract EN
Parkinson’s disease (PD) leads to impairment in multiple cognitive domains.
Micrographia is a relatively early PD sign of visuomotor dysfunction, characterized by a global reduction in writing size and a decrement in size during writing.
Here we aimed to investigate the effect of withdrawal of visual feedback on writing size in patients with PD.
Twenty-five patients with non-tremor-dominant PD without cognitive dysfunction and twenty-five age-matched controls had to write a standard sentence with and without visual feedback.
We assessed the effect of withdrawal of visual feedback by measuring vertical word size (i), horizontal length of the sentence (ii), and the summed horizontal word length without interspacing (iii), comparing patients with controls.
In both patients and controls, writing was significantly larger without visual feedback.
This enlargement did not significantly differ between the groups.
Smaller handwriting significantly correlated with increased disease severity.
Contrary to previous observations that withdrawal of visual feedback caused increased writing size in specifically PD, we did not find differences between patients and controls.
Both groups wrote larger without visual feedback, which adds insight in general neuronal mechanisms underlying the balance between feed-forward and feedback in visuomotor control, mechanisms that also hold for grasping movements.
American Psychological Association (APA)
Potgieser, Adriaan R. E.& Roosma, Elizabeth& Beudel, Martijn& de Jong, Bauke M.. 2015. The Effect of Visual Feedback on Writing Size in Parkinson’s Disease. Parkinson’s Disease،Vol. 2015, no. 2015, pp.1-4.
https://search.emarefa.net/detail/BIM-1075918
Modern Language Association (MLA)
Potgieser, Adriaan R. E.…[et al.]. The Effect of Visual Feedback on Writing Size in Parkinson’s Disease. Parkinson’s Disease No. 2015 (2015), pp.1-4.
https://search.emarefa.net/detail/BIM-1075918
American Medical Association (AMA)
Potgieser, Adriaan R. E.& Roosma, Elizabeth& Beudel, Martijn& de Jong, Bauke M.. The Effect of Visual Feedback on Writing Size in Parkinson’s Disease. Parkinson’s Disease. 2015. Vol. 2015, no. 2015, pp.1-4.
https://search.emarefa.net/detail/BIM-1075918
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1075918