Thesis (M.Sc.)--York University, 2006. Graduate Programme in Kinesology and Health Science. / Typescript. Includes bibliographical references (leaves 41-44). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR29580

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Thesis (M.A.)--York University, 2002. / Typescript. Includes bibliographical references (leaves 87-98). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ71595.

The purpose was to examine the ball catching strategies of 15 children with developmental coordination disorder (DCD) compared to 15 of their peers without DCD, and 15 younger children matched on ball skills. A ball catching activity (catching 10 consecutive balls in five different positions) and the developmental sequences proposed by Haywood and Getchell (2005) were used to evaluate movement patterns. Children with DCD caught significantly fewer balls than their peers at the chest and above the head. Children with DCD demonstrated delayed arm action catching on the right and delayed body actions when balls were projected away from body compared to their peers. In addition, development of some body actions of children with DCD was different compared to younger children. Results suggested that children with DCD have not developed accurate and consistent movement patterns.

Coordinated gaze and hand movements predominate a number of our interactions in reachable space and yet few studies examine the potential contribution of tactile feedback in planning these actions. This thesis was designed to investigate eye and hand coordination during movement sequences when reaching out to interact with objects. We developed a virtual reality paradigm that allowed us to control visual, tactile, and in some cases, auditory feedback provided to participants. Participants reached and touched five objects in succession. We measured behaviour that resulted from removing one or more of the aforementioned sources of feedback – focusing on task accuracy, and the timing and dynamics of eye and hand movements. Our principle manipulations were to remove visual feedback of the hand, and/or to change the object response to contact. We also unexpectedly removed tactile feedback signaling contact. In Experiment 1, we examined gaze and hand movement timing relative to contact events. Gaze remained long enough to capture contact in central vision, but also followed a time course indicating that contact timing was predicted. In Experiment 2 we examined the influence of dynamic object consequences (i.e., motion). Gaze remained to monitor consequences that follow initial contact especially when the hand was invisible; with longer delays it became difficult to differentiate between predictive or reactive movements. In Experiment 3 we directly tested whether gaze would hold upon a site of action during prolonged manipulation. Here, gaze remained past contact time and instead its departure was associated with the completion of action. Our findings are congruent with the notion that visually guided reaches are controlled to facilitate directing the hand to viewed locations of action – without visual feedback of the hand accuracy diminished and hand approach changed across all experiments. However, we provide consistent evidence that gaze is also controlled to capture planned sensory consequences related to action at its viewed location. Monitoring these sites would facilitate comparing predicted sensory events with those that are actively measured and improve control throughout the movement sequence. Such a process also indicates the importance of considering tactile feedback when examining coordinated eye and hand movements. / Thesis (Ph.D, Neuroscience Studies) -- Queen's University, 2009-11-13 16:12:30.086

Thesis (doctoral)--Jena, 1933. / Excerpt from Zeitschrift für Sinnesphysiologie, Bd. 64 (1933).

Thesis (M.Sc.)--York University, 2007. Graduate Programme in Kinesiology. / Typescript. Includes bibliographical references (leaves 77-83). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR29290

Thesis (doctoral)--Jena, 1933. / Excerpt from Zeitschrift für Sinnesphysiologie, Bd. 64 (1933).

No description available.

No description available.