忽视症患者数字心理表征的空间属性  

Spatial nature of mental number line in neglect patients

作　　者：杨琴[1] 田仰华[1] 汪凯[1] 

机构地区：[1]安徽医科大学第一附属医院神经内科、神经心理学实验室,合肥230022

出　　处：《中华医学杂志》2009年第9期610-613,共4页National Medical Journal of China

基　　金：国家重点基础研究发展计划（973计划）基金资助项目（2005CB522800）;国家自然科学基金资助项目（30370479,30670706）

摘　　要：目的探讨数字心理表征的空间特性。方法对年龄、文化程度、简易精神状态量表（MMSE）评分等相匹配的8例右侧脑损伤伴左侧空间忽视患者，8例右侧脑损伤不伴左侧空间忽视患者和8名健康者进行数字等分试验。结果忽视组数字等分主观中点的错误率较高44．63％±12．49％，随着两数字间距加大，主观中点向右的偏移率增加，顺向呈现数字，间距为3、5、7、9时，平均偏移率分别为-4．25％±7．87％、12．63％±19．06％、58．38％±24．30％、111．50％±53．54％。忽视组反向呈现数字与顺向呈现数字成绩相似，间距为3、5、7、9时，平均偏移率分别为-18．40％±25．35％、-1．60％±21．4％、56．80％±27．04％、108．20％±55．10％。顺向与反向呈现数字等分试验的结果经方差分析得出F=1．705，P=0．262；数字等分试验与线等分试验的结果经相关分析得出r=0．887，P=0．045。对照组主观中点的错误率极低，且成绩不受数字间距大小影响。所用数字大小对各组成绩的影响无统计学意义。结论忽视组数字等分的成绩与其线等分试验的成绩具有相关性，说明数字心理表征与物理线段的空间特性显著相似，具有自左向右的空间排列。忽视症在表征层次存在障碍。Objective To investigate the spatial nature of mental number line. Methods Number bisection test was conducted on 8 right-brain-damaged patients with persistent left neglect, 8 right-brain- damaged patients without spatial neglect, and 8 healthy control subjects, all aged- and education-levelmatched and right-handed. Results The error rate in subjective midpoint of the 8 neglect patients was （44.63±12.49 ） % （ forward direction ） and （ 46.00 ± 12.10 ） % （ reverse direction ）, both significantly higher than those of the right brain damage control group [ （ 3.34 ± 4. 32 ） % and （ 5.21± 5.21 ） % respectively ] and healthy control group [ （0.00 ± 0.00） % and （0.00±0.00） % respectively ] （ all P 〈 0.01 ）. The longer the interval between the numbers, the higher right-shift error rate ： corresponding to the interval sizes as 3, 5, 7, and 9, the mean deviation rates of antrorse presentation were（ - 4.25 ± 7.87） %, （ 12.63 ± 19.06） % , （58.38 ±24.30） %, and （ 111.50 ± 53.54） % respectively, and the mean deviation rates of reverse presentation were（ - 18.40 ± 25.35 ） %, （ - 1.60 ± 21.4） %, （56.80± 27.04） %, and （ 108.20±55.10） % respectively. Analysis of variance of the antrorse presentation and reverse presentation showed the result ： F = 1. 705 and P = 0. 262. Correlation analysis of the mental number bisection task and line bisection task showed the result ： r = 0. 887 and P = 0. 045. The control subjects made very few errors in subjective midpoint and their performance was not affected by interval sizes. The magnitude of numbers used did not influence the performance in any group. Conclusion The performance of neglect patients in bisecting mental number line closely mirrors their difficulty in bisecting physical lines. This demonstrates the spatial nature of the mental number line isomorphism to physical lines. The mental number line is orientated in a left-to-right manner. Disorder exists at the characterization level in neglect

关 键 词：知觉障碍 神经心理学测验 患者 忽视症 数字心理表 

分 类 号：R686[医药卫生—骨科学]