Improved Accuracy on Lateralized Spatial Judgments in Healthy Aging.
Improved Accuracy on Lateralized Spatial Judgments in Healthy Aging.
复制标题
提高健康老龄化中偏侧空间判断的准确性。
DOI：
10.1017/s1355617719000900
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Heilman,KennethM
中科院分区：
文献类型：
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作者：
Williamson,JohnB;Murphy,Aidan;Lamb,DamonG;Schwartz,Zared;Szeles,Dana;Harciarek,Michal;Mańkowska,Aleksandra;Heilman,KennethM
健康的年轻人经常表现出一种被称为“假神经元”的空间偏差，这种偏差通常随着年龄的增长而减少。这种现象的一个假设是与年龄相关的右半球功能恶化（右半脑老化）。如果是真的，那么无论内容如何，在所有空间注意任务中，都应该明显存在更大的时间偏差。另一种假设是随着年龄的增长，不对称半球激活减少（哈罗德）。如果是真的，老年参与者可能会显示减少偏见，在所有的空间任务，无论具体的空间contents.MethodsSeventy右利手的健康参与者，33年轻（21-40）和37老年人（60-78），被要求将实体和人物一分为二字母线，以及执行左，右三等分的实线。结果两组偏离向左的实线平分和左三等分。两组在右三等分和特征线二等分上都向右偏离。在所有的任务，老年参与者更准确的比年轻的participator.ConclusionsThe发现，老年参与者更准确的比年轻的参与者在所有的二分和三分的条件表明，减少不对称的半球激活这些专门的网络重要的对侧空间注意力或空间动作意图的分配。
ObjectivesHealthy young adults often demonstrate a leftward spatial bias called “pseudoneglect” which often diminishes with aging. One hypothesis for this phenomenon is an age-related deterioration in right hemisphere functions (right hemi-aging). If true, then a greater rightward bias should be evident on all spatial attention tasks regardless of content. Another hypothesis is a decrease in asymmetrical hemispheric activation with age (HAROLD). If true, older participants may show reduced bias in all spatial tasks, regardless of leftward or rightward biasing of specific spatial content.MethodsSeventy right-handed healthy participants, 33 younger (21–40) and 37 older (60–78), were asked to bisect solid and character-letter lines as well as to perform left and right trisections of solid lines.ResultsBoth groups deviated toward the left on solid line bisections and left trisections. Both groups deviated toward the right on right trisections and character line bisections. In all tasks, the older participants were more accurate than the younger participants.ConclusionsThe finding that older participants were more accurate than younger participants across all bisection and trisection conditions suggests a decrease in the asymmetrical hemispheric activation of these specialized networks important in the allocation of contralateral spatial attention or spatial action intention.