Show simple item record Stone, Kayla D. Gonzalez, Claudia L. R. 2016-11-04T16:42:22Z 2016-11-04T16:42:22Z 2014
dc.identifier.citation Stone, K. D., & Gonzalez, C. L. R. (2014). Grasping without sight: insights from the congenitally blind. PLoS ONE, 9(10): e110175. doi:10.1371/journal/pone.0110175 en_US
dc.description Sherpa Romeo green journal: open access en_US
dc.description.abstract We reach for and grasp different sized objects numerous times per day. Most of these movements are visually-guided, but some are guided by the sense of touch (i.e. haptically-guided), such as reaching for your keys in a bag, or for an object in a dark room. A marked right-hand preference has been reported during visually-guided grasping, particularly for small objects. However, little is known about hand preference for haptically-guided grasping. Recently, a study has shown a reduction in right-hand use in blindfolded individuals, and an absence of hand preference if grasping was preceded by a short haptic experience. These results suggest that vision plays a major role in hand preference for grasping. If this were the case, then one might expect congenitally blind (CB) individuals, who have never had a visual experience, to exhibit no hand preference. Two novel findings emerge from the current study: first, the results showed that contrary to our expectation, CB individuals used their right hand during haptically-guided grasping to the same extent as visually-unimpaired (VU) individuals did during visually-guided grasping. And second, object size affected hand use in an opposite manner for haptically- versus visually-guided grasping. Big objects were more often picked up with the right hand during hapticallyguided, but less often during visually-guided grasping. This result highlights the different demands that object features pose on the two sensory systems. Overall the results demonstrate that hand preference for grasping is independent of visual experience, and they suggest a left-hemisphere specialization for the control of grasping that goes beyond sensory modality en_US
dc.language.iso en_CA en_US
dc.publisher Public Library of Science en_US
dc.subject Grasping en_US
dc.subject Haptically-guided grasping en_US
dc.subject Visually-guided grasping en_US
dc.subject Hand preference en_US
dc.subject Right hand en_US
dc.subject Congenitally blind en_US
dc.title Grasping without sight: insights from the congenitally blind en_US
dc.type Article en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Kinesiology and Physical Education en_US
dc.description.peer-review Yes en_US
dc.publisher.institution University of Lethbridge en_US

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