Impaired visual size-discrimination in children with movement disorders

Neuropsychologia
Monica GoriDavid Burr

Abstract

Multisensory integration of spatial information occurs late in childhood, at around eight years (Gori, Del Viva, Sandini, & Burr, 2008). For younger children, the haptic system dominates size discrimination and vision dominates orientation discrimination: the dominance may reflect sensory calibration, and could have direct consequences on children born with specific sensory disabilities. Here we measure thresholds for visual discrimination of orientation and size in children with movement disorders of upper limbs. Visual orientation discrimination was very similar to the age-matched typical children, but visual size discrimination thresholds were far worse, in all eight individuals with early-onset movement disorder. This surprising and counterintuitive result is readily explained by the cross-sensory calibration hypothesis: when the haptic sense is unavailable for manipulation, it cannot be readily used to estimate size, and hence to calibrate the visual experience of size: visual discrimination is subsequently impaired. This complements a previous study showing that non-sighted children have reduced acuity for haptic orientation, but not haptic size, discriminations (Gori, Sandini, Martinoli, & Burr, 2010). Together these stu...Continue Reading

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Citations

Nov 26, 2013·Brain : a Journal of Neurology·Monica GoriDavid C Burr
Sep 4, 2014·Experimental Brain Research·Alessandra SciuttiMonica Gori
Oct 31, 2012·Developmental Science·Monica GoriDavid Burr
Apr 9, 2014·Current Opinion in Neurobiology·Robert L SeilheimerDora E Angelaki
Nov 5, 2014·Frontiers in Psychology·Monica GoriDavid Burr
Apr 15, 2016·PLoS Computational Biology·Wendy J Adams
Jul 7, 2016·Scientific Reports·Karin PetriniMarko Nardini
Nov 29, 2015·Developmental Science·Giulia CappagliMonica Gori
Apr 22, 2017·Child Neuropsychology : a Journal on Normal and Abnormal Development in Childhood and Adolescence·Giulia PurpuraFrancesca Tinelli
Apr 25, 2019·Child Neuropsychology : a Journal on Normal and Abnormal Development in Childhood and Adolescence·Giulia PurpuraFrancesca Tinelli
Jul 19, 2019·Frontiers in Psychology·Gualtiero Volpe, Monica Gori

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