NDLI: Infantile nystagmus syndrome is associated with inefficiency of goal-directed hand movements.

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Infantile nystagmus syndrome is associated with inefficiency of goal-directed hand movements.

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Infantile nystagmus syndrome is associated with inefficiency of goal-directed hand movements.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Van Rens, Ger H. M. B. Liebrand-Schurink, Joyce Boonstra, F. Nienke Cox, Ralf F. A. Cillessen, Antonius H. N. Meulenbroek, Ruud G. J.
Description	Country affiliation: Netherlands Author Affiliation: Liebrand-Schurink J ( Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands Bartiméus, Institute for the Visually Impaired, Zeist, The Netherlands.); Cox RF ( Bartiméus, Institute for the Visually Impaired, Zeist, The Netherlands Department of Developmental Psychology, University of Groningen, Groningen, The Netherlands.); van Rens GH ( VU Medical Centre Amsterdam, Amsterdam, The Netherlands.); Cillessen AH ( Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands.); Meulenbroek RG ( Department Cognitive Neuroscience, Donders Institute for Brain, Radboud University Medical Center, Nijmegen, The Netherlands.); Boonstra FN ( Bartiméus, Institute for the Visually Impaired, Zeist, The Netherlands Department Cognitive Neuroscience, Donders Institute for Brain, Radboud University Medical Center, Nijmegen, The Netherlands.)
Abstract	PURPOSE: The effect of infantile nystagmus syndrome (INS) on the efficiency of goal-directed hand movements was examined. METHODS: We recruited 37 children with INS and 65 control subjects with normal vision, aged 4 to 8 years. Participants performed horizontally-oriented, goal-directed cylinder displacements as if they displaced a low-vision aid. The first 10 movements of 20 back-and-forth displacements in a trial were performed between two visually presented target areas, and the second 10 between remembered target locations (not visible). Motor performance was examined in terms of movement time, endpoint accuracy, and a harmonicity index reflecting energetic efficiency. RESULTS: Compared to the control group, the children with INS performed the cylinder displacements more slowly (using more time), less accurately (specifically in small-amplitude movements), and with less harmonic acceleration profiles. Their poor visual acuity proved to correlate with slower and less accurate movements, but did not correlate with harmonicity. When moving between remembered target locations, the performance of children with INS was less accurate than that of the children with normal vision. In both groups, movement speed and harmonicity increased with age to a similar extent. CONCLUSIONS: Collectively, the findings suggest that, in addition to the visuospatial homing-in problems associated with the syndrome, INS is associated with inefficiency of goal-directed hand movements. ( http://www.trialregister.nl number, NTR2380.).
ISSN	01460404
e-ISSN	15525783
Journal	Investigative Opthalmology & Visual Science
Issue Number	1
Volume Number	56
Language	English
Publisher	Association for Research in Vision and Ophthalmology
Publisher Date	2014-12-23
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Physiopathology Eye Movements Physiology Movement Nystagmus, Congenital Psychomotor Performance Visual Acuity Child, Preschool Syndrome Comparative Study Multicenter Study Research Support, Non-u.s. Gov't Discipline Ophthalmology
Content Type	Text
Resource Type	Article
Subject	Ophthalmology Sensory Systems Cellular and Molecular Neuroscience

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