Systematic retinotopic reaching error vectors in unilateral optic ataxia

被引:48
作者
Blangero, Annabelle [1 ,2 ]
Ota, Hisaaki [3 ]
Rossetti, Yves [1 ,2 ,5 ,6 ]
Fujii, Toshikatsu [4 ]
Ohtake, Hiroya [7 ]
Tabuchi, Michio [8 ]
Vighetto, Alain [1 ,2 ,5 ,6 ]
Yamadori, Atsushi [9 ]
Vindras, Philippe [1 ,2 ]
Pisella, Laure [1 ,2 ]
机构
[1] INSERM, U864, F-69676 Bron, France
[2] Univ Lyon 1, IFNL, Lyon, France
[3] Sapporo Med Univ Hosp, Div Rehabil, Sapporo, Hokkaido, Japan
[4] Tohoku Univ, Grad Sch Med, Dept Behav Neurol & Cognit Neurosci, Sendai, Miyagi 980, Japan
[5] Hop Henry Gabrielle, Hosp Civils Lyon, Lyon, France
[6] Hop Neurol, Lyon, France
[7] Yamagata Univ, Sch Med, Dept Internal Med & Therapeut, Yamagata 99023, Japan
[8] Kobe Univ, Grad Sch Med, Dept Psychiat & Neurol, Kobe, Hyogo 657, Japan
[9] Kobe Gakuin Univ, Fac Humanities & Sci, Dept Psychol, Kobe, Hyogo 65121, Japan
关键词
Optic ataxia; Reference frame; Eye-centred; Reaching; Posterior parietal cortex; POSTERIOR PARIETAL CORTEX; HAND MOTOR SYSTEMS; VISUOMOTOR COORDINATION; OPTIMAL RESPONSE; VISUAL TARGET; EYE; SPACE; ACTIVATION; MECHANISMS; MOVEMENTS;
D O I
10.1016/j.cortex.2009.02.015
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
The main aim of this study is to determine the reference frame of the pointing errors that characterize patients with unilateral optic ataxia (OA). The reaching errors of seven patients with unilateral OA when pointing on a 2D matrix in peripheral vision were investigated in order to better qualify the reference frame of their deficit. Patients were asked to fixate a central target and then to point at one of 24 visual targets presented in their left or right peripheral visual fields, with their left or right hands. The four left and the three right hemisphere lesion patients with OA exhibited an identical pattern of results. In the contralesional visual field, error vectors were systematically directed toward the fixation point, rather than horizontally toward the side of the lesion. OA results from a deficit in transforming targets' eye-centred coordinates into appropriate motor commands. (C) 2009 Elsevier Srl. All rights reserved.
引用
收藏
页码:77 / 93
页数:17
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