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Spatial deficits in visuomotor contr...

Broderick, Carol Elizabeth.

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Spatial deficits in visuomotor control following right parietal injury.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Spatial deficits in visuomotor control following right parietal injury./
Author:	Broderick, Carol Elizabeth.
Description:	77 p.
Notes:	Source: Masters Abstracts International, Volume: 46-03, page: 1769.
Contained By:	Masters Abstracts International46-03.
Subject:	Biology, Animal Physiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR34279
ISBN:	9780494342794

Spatial deficits in visuomotor control following right parietal injury.
Broderick, Carol Elizabeth.

Spatial deficits in visuomotor control following right parietal injury. - 77 p.

Source: Masters Abstracts International, Volume: 46-03, page: 1769.

Thesis (M.A.)--University of Waterloo (Canada), 2007.

Superior parietal cortex has been implicated in visuomotor guidance and is proposed to be specialised for action in the lower visual field and peripersonal space. Two patients, one with a right superior parietal lesion leading to optic ataxia (ME), and one with a lesion affecting right inferior parietal cortex (LH), were compared to elderly controls (n=8) and young controls (n=8) on a reciprocal pointing task with movements made in the near-far direction (i.e., sagittal plane) or right-left direction (i.e., fronto-parallel plane). In contrast to both control groups, who demonstrated a speed-accuracy trade-off in movement time and peak velocity, neither of the patients did. When the time spent post-peak velocity (represented as a percentage of total movement time) was examined, both patients demonstrated larger times post-peak velocity than controls for all movement directions. Furthermore, while rightward movements of the right hand had higher times post-peak velocity than leftward movements there were no directional patterns for near-far movements which contrasted with controls who had larger times post-peak velocity for near movements. The patient with the more superior lesion (ME) had the greatest difficulty with movements made back toward the body, suggestive of a role for superior parietal cortex in the fine tuning of movements made in this region of space (i.e., personal or peripersonal space). In contrast, all directions of movement seemed to be equally affected in the patient with a more inferior lesion. These results are discussed in terms of the different roles played by inferior and superior parietal cortex in the control of visually guided movements.

ISBN: 9780494342794Subjects--Topical Terms:

1017835
Biology, Animal Physiology.

Spatial deficits in visuomotor control following right parietal injury.
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020 $a 9780494342794
035 $a (UMI)AAIMR34279
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100 1 $a Broderick, Carol Elizabeth. $3 1267772
245 1 0 $a Spatial deficits in visuomotor control following right parietal injury.
300 $a 77 p.
500 $a Source: Masters Abstracts International, Volume: 46-03, page: 1769.
502 $a Thesis (M.A.)--University of Waterloo (Canada), 2007.
520 $a Superior parietal cortex has been implicated in visuomotor guidance and is proposed to be specialised for action in the lower visual field and peripersonal space. Two patients, one with a right superior parietal lesion leading to optic ataxia (ME), and one with a lesion affecting right inferior parietal cortex (LH), were compared to elderly controls (n=8) and young controls (n=8) on a reciprocal pointing task with movements made in the near-far direction (i.e., sagittal plane) or right-left direction (i.e., fronto-parallel plane). In contrast to both control groups, who demonstrated a speed-accuracy trade-off in movement time and peak velocity, neither of the patients did. When the time spent post-peak velocity (represented as a percentage of total movement time) was examined, both patients demonstrated larger times post-peak velocity than controls for all movement directions. Furthermore, while rightward movements of the right hand had higher times post-peak velocity than leftward movements there were no directional patterns for near-far movements which contrasted with controls who had larger times post-peak velocity for near movements. The patient with the more superior lesion (ME) had the greatest difficulty with movements made back toward the body, suggestive of a role for superior parietal cortex in the fine tuning of movements made in this region of space (i.e., personal or peripersonal space). In contrast, all directions of movement seemed to be equally affected in the patient with a more inferior lesion. These results are discussed in terms of the different roles played by inferior and superior parietal cortex in the control of visually guided movements.
590 $a School code: 1141.
650 4 $a Biology, Animal Physiology. $3 1017835
650 4 $a Biology, Neuroscience. $3 1017680
650 4 $a Psychology, Physiological. $3 1017869
690 $a 0317
690 $a 0433
690 $a 0989
710 2 $a University of Waterloo (Canada). $3 1017669
773 0 $t Masters Abstracts International $g 46-03.
790 $a 1141
791 $a M.A.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR34279