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The Role of Retinal Limb Position on the Use of Visual Feedback during Manual Aiming Movements

Vision is important for the control of upper limb movements (Woodworth, 1899). How and when vision is used during a limb movement continues to be debated. In this thesis, I examined the use of visual feedback as a function of retinal limb position. Individuals made rapid upper limb aiming movements to a target location and vision was provided when the limb was at varying degrees of retinal eccentricity. The temporal characteristics, endpoint accuracy and precision, as well as the spatial variability of the limb trajectories were recorded and analyzed. No relationship was observed between retinal limb positions and the use of visual feedback during the movements. These results suggest that the use of vision during limb movements is not directly tied to the neuroanatomy of the eye and challenges continuous models of upper limb control.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OTU.1807/31275
Date12 December 2011
CreatorsKennedy, Andrew
ContributorsTremblay, Luc
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
Languageen_ca
Detected LanguageEnglish
TypeThesis

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