Benefits of interhemispheric collaboration can be eliminated by mixing stimulus formats that involve different cortical access routes
Benefits of interhemispheric collaboration can be eliminated by mixing stimulus formats that involve different cortical access routes
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通过混合涉及不同皮质通路的刺激形式可以消除半球间协作的好处
DOI：
10.1016/j.bandc.2006.10.007
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发表时间：
2007
影响因子：
2.5
通讯作者：
J. Hellige
中科院分区：
文献类型：
--
作者：
Urvi J. Patel;J. Hellige
先前的研究表明，当任务变得更加困难或认知复杂时，在两个大脑半球之间分配信息处理负荷的好处超过了半球间转移的成本。这被证明为更好的性能时，两个刺激进行比较，每个视野和半球比当两个刺激都呈现给同一个单一的半球（一个跨半球的优势）。两个实验表明，这一发现并不能推广到复杂的任务，需要匹配的数字量表示的两个非常不同的视觉格式，其处理涉及有点不同的皮层区域：数字和骰子样的点图案。事实上，混合这些刺激形式始终产生半球内优势。我们建议，当两个同时呈现的刺激，在足够不同的视觉格式，识别两个刺激可能会发生在平行的，通过不同的皮质通路和很少或没有干扰，即使当它们被提交给同一个大脑半球。
Previous studies indicate that the benefits of dividing an information processing load across both cerebral hemispheres outweigh the costs of interhemispheric transfer as tasks become more difficult or cognitively complex. This is demonstrated as better performance when two stimuli to be compared are presented one to each visual field and hemisphere than when both stimuli are presented to the same single hemisphere (an across-hemisphere advantage). Two experiments indicate that this finding does not generalize to complex tasks that require matching numeric quantities represented by two very different visual formats whose processing involves somewhat different cortical areas: digits and dice-like dot patterns. In fact, mixing these stimulus formats consistently produces a within-hemisphere advantage. We propose that, when two simultaneously presented stimuli are presented in sufficiently different visual formats, identification of the two stimuli may take place in parallel, via different cortical access routes and with little or no interference, even when they are presented to the same cerebral hemisphere.