Relative processing demands influence cerebral laterality for verbal-motor integration in persons with Down syndrome.
Relative processing demands influence cerebral laterality for verbal-motor integration in persons with Down syndrome.
复制标题
相对处理需求影响唐氏综合症患者语言运动整合的大脑偏侧性。
DOI：
10.1016/s0010-9452(08)70178-3
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Roy,EricA
中科院分区：
文献类型：
--
作者：
Heath,Matthew;Welsh,TimothyN;Simon,DominicA;Tremblay,Luc;Elliott,Digby;Roy,EricA
对唐氏综合症（DS）人群大脑特化的研究揭示了一种异常的组织模式。特别是，双耳听力研究表明，左耳/右半球在言语感知方面占主导地位，而运动控制研究表明，左半球在执行运动控制方面占主导地位。在本研究中，我们采用了最近对二分听力程序的改编来检查在执行偏侧言语运动任务期间的半球间整合。具体来说，使用选择性二分聆听程序，参与者被要求完成快速的左手或右手指向运动，指向与呈现给他们预先耳朵的单词相对应的两个图形图标之一。我们观察到，患有 DS 的人 (N = 17) 和年龄匹配的对照者 (N = 35) 在我们的双耳瞄准任务中表现出右耳优势 (REA)。虽然这些结果似乎与之前的二分听力研究相矛盾，但我们认为 DS 群体中侧耳优势的表现可能更多地与任务的反应要求有关，而不是与刺激材料的特征或复杂性有关。
The study of cerebral specialization in the Down syndrome (DS) population has revealed an anomalous pattern of organization. In particular, dichotic-listening studies have suggested a left-ear/right hemisphere dominance for speech perception, whereas motor control research has revealed a left hemisphere dominance for executive-motor control. In the present investigation, we employed a recent adaptation of the dichotic listening procedure to examine interhemispheric integration during the performance of a lateralized verbal-motor task. Specifically, using the selective dichotic-listening procedure, participants were required to complete a rapid left or right hand pointing movement to one of two pictorial icons corresponding to the word presented to their precued ear. We observed that persons with DS (N = 17) and age-matched controls (N = 35) exhibited a right-ear advantage (REA) for our dichotic-aiming task. While these results appear to contradict previous dichotic listening studies, we propose that the manifestation of a lateral ear advantage in the DS population may have more to do with the response requirements of the task than with the characteristics or complexity of the stimulus material.