Initiation and inhibition of saccadic eye movements in younger and older adults: an analysis of the gap effect.
Initiation and inhibition of saccadic eye movements in younger and older adults: an analysis of the gap effect.
复制标题
年轻人和老年人眼跳运动的启动和抑制：间隙效应分析。
DOI：
10.1093/geronb/52b.2.p103
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Chasteen,AL
中科院分区：
文献类型：
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作者：
Pratt,J;Abrams,RA;Chasteen,AL
先前对年轻人的研究已经表明，当视觉注视刺激在外围目标刺激出现之前被移除时，启动扫视眼球运动的延迟通常会减少（“间隙效应”）。本研究试图确定这种固定偏移是否会在年轻人和老年人中产生类似的反应时间减少。结果表明，老年人有较长的整体lavery启动扫视眼球运动，他们表现出差距效应。然而，相对于整体扫视延迟，年轻人和老年人之间由于注视偏移导致的反应时间减少大致相等。这些发现，沿着其他一些最近的证据，表明在扫视眼球运动的生产涉及的一些机制可能没有揭示的变化，经常发现在骨骼运动系统随着年龄的增长。研究结果的影响，以年龄相关的抑制功能的差异进行了讨论。
Previous research with young adults has shown that the latency to initiate a saccadic eye movement is typically reduced when the visual fixation stimulus is removed prior to the appearance of a peripheral target stimulus (the “gap effect”). The present study sought to determine whether such fixation offsets would produce similar reductions in reaction time in both younger and older adults. The results indicated that older adults have longer overall latencies to initiate saccadic eye movements and that they exhibit the gap effect. However, the reduction in reaction time due to the fixation offset was approximately equal between younger and older adults relative to the overall saccadic latencies. These findings, along with some other recent evidence, suggest that some of the mechanisms involved in the production of saccadic eye movements may not reveal the changes often found in the skeletal motor system with increasing age. The implications of the findings to age-related differences in inhibitory function are discussed.