Halving a horizontal segment: a study on hemisphere-damaged patients with cerebral focal lesions.
Halving a horizontal segment: a study on hemisphere-damaged patients with cerebral focal lesions.
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将水平段减半：对患有脑局灶性病变的半球损伤患者的研究。
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
H. Spinnler
中科院分区：
文献类型：
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作者：
E. Bisiach;E. Capitani;A. Colombo;H. Spinnler
本研究的目的是指出局灶性脑损伤患者的半球不对称性和正常人的手不对称性，双眼平分一条水平线。50名左半球和53名右半球患者（均按视野缺损的存在/不存在细分）和50名对照（按他们用于执行任务的手划分）。4个不同长度的线段组成试验材料，通过参数统计程序计算出相对于几何中点的误差分数。结果表明：（i）健康受试者的平均位移为0.001，与他们使用的手无关。（2）左、右半球损伤患者出现的减半误差方向相反，前者为1/2，后者为1/2;（iii）只有右侧视野缺损患者的行为与相应对照组有显著差异。我们的研究结果指出，在减半任务中，右半球主要是其后部区域的重要性。
The aim of this study was to point out a hemisphere asymmetry in focal brain-damaged patients and a hand asymmetry in normals on halving binocularly a horizontal line. 50 left hemisphere and 53 right hemisphere patients (both subdivided by presence/absence of visual field defect) and 50 controls (divided by the hand they used to carry out the task) were employed. 4 differently long segments made up the test material and the error scores with respect to the geometric midpoint were worked out by means of parametric statistical procedures. It turned out that: (i) healthy subjects committed a mean leftward displacement, regardless of the hand they used. All the same, only the halving error committed by the right hand is significant keeping as reference the geometric midpoint of the segment; (ii) left and right hemisphere-damaged patients committed halving errors, that are opposite in direction, leftward for the former and rightward for the latter; (iii) the behaviour of right patients with visual field defects is the only to be significantly different from that of the corresponding controls. Our findings point to prevailing importance of the right hemisphere mainly of its posterior areas, in the halving task.