Unilateral resection of both cortical visual pathways in a pediatric patient alters action but not perception

被引:2
作者
Ahmad, Zoha [1 ,2 ]
Behrmann, Marlene [3 ,4 ]
Patterson, Christina [5 ]
Freud, Erez [2 ,6 ]
机构
[1] York Univ, Dept Biol, N York, ON, Canada
[2] York Univ, Ctr Vis Res, N York, ON, Canada
[3] Carnegie Mellon Univ, Dept Psychol, Pittsburgh, PA 15213 USA
[4] Carnegie Mellon Univ, Neurosci Inst, Pittsburgh, PA 15213 USA
[5] Univ Pittsburgh, Dept Pediat, Pittsburgh, PA 15260 USA
[6] York Univ, Dept Psychol, N York, ON, Canada
基金
加拿大自然科学与工程研究理事会; 美国国家卫生研究院;
关键词
Action and perception; Grasping; Dorsal and ventral pathways; Vision development; Hemispherectomy; RIGHT-HEMISPHERE; OPTIC ATAXIA; MENTAL ROTATION; DISSOCIATION; DORSAL; FORM; ORGANIZATION; DEFICIT; NEUROPSYCHOLOGY; SPECIALIZATION;
D O I
10.1016/j.neuropsychologia.2022.108182
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 human cortical visual system consists of two major pathways, a ventral pathway which subserves perception and a dorsal pathway which primarily subserves visuomotor control. Previous studies have found that children with cortical resections of the ventral visual pathway retain largely normal visuoperceptual abilities. Whether visually guided actions, supported by computations carried out by the dorsal pathway, follow a similar pattern of preservation remains unknown. To address this question, we examined visuoperceptual and visuomotor behaviors in a pediatric patient, TC, who underwent a cortical resection that included portions of the left ventral and dorsal pathways. We collected kinematic data when TC used her right and left hands to perceptually estimate the width of blocks that varied in width and length, and, separately, to grasp the same blocks. TC's perceptual estimation performance was comparable to that of controls, independent of the hand used. In contrast, relative to controls, she showed reduced visuomotor sensitivity to object shape and this was more evident when she grasped the objects with her contralesional right hand. These results provide novel evidence for a striking difference in the competence of the two visual pathways to cortical injuries acquired in childhood.
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页数:11
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