Carlomagno S, Parlato V, Belfiore A, Silvano A, Vanderlinden M, Seron X
Istituto di Scienze Neurologiche, Università di Napoli.
Acta Neurol (Napoli). 1993 Aug;15(4):241-52.
Thirteen patients suffering from Unilateral Spatial Neglect and 6 Right Brain Damaged Control Patients were tested on a line bisection task in order to verify peculiar patterns of error. Stimuli were arranged in order to avoid confounding the effects of line length and line position in the space. Two parameters of rightward displacement of setting point were used: 1) the distance of patient's setting point from actual line midpoint, and 2) the deduced left end-point of the line that patient took into account. Results showed that: 1) the rightward extension of lines did not lead to a consistent rightward displacement of setting point; 2) error significantly increased as lines extended more than 10 cm in the left hemispace; 3) the USN severity amplified the degradation of leftmost portion of stimuli until the deduced left endpoint of all space/length conditions was aligned on the left of patient's sagittal midplane. The interpretation of these results points to the particular arrangement of neurons directing attention on specific portions of the visual field.
对13名患有单侧空间忽视症的患者和6名右脑损伤对照患者进行了线段二等分任务测试，以验证特殊的错误模式。刺激物的排列方式是为了避免混淆线段长度和线段在空间中位置的影响。使用了设定点向右位移的两个参数：1）患者设定点与实际线段中点的距离，以及2）患者所考虑的线段的推断左端点。结果表明：1）线段向右延伸并未导致设定点一致地向右位移；2）当线段在左半空间延伸超过10厘米时，误差显著增加；3）单侧空间忽视症的严重程度加剧了刺激最左侧部分的退化，直到所有空间/长度条件下的推断左端点都对齐在患者矢状中平面的左侧。这些结果的解释指向了将注意力导向视野特定部分的神经元的特殊排列。
