Effect of Sequential Comparison on Active Processing of Sound Duration
Effect of Sequential Comparison on Active Processing of Sound Duration
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DOI：
10.1002/hbm.23673
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发表时间：
2017-09-01
影响因子：
4.8
通讯作者：
Brechmann, Andre
中科院分区：
文献类型：
--
作者：
Angenstein, Nicole;Brechmann, Andre
先前关于声音活动持续时间加工的研究显示，左半球或右半球主要参与的结果是相反的。声音事件的持续时间通常是相对于其他声音进行判断的。这需要随着听觉事件随着时间的推移而展开顺序比较。我们假设，在一项任务中增加对顺序比较的要求会增加左侧听觉皮质的参与。结合目前的fMRI研究，我们通过比较范畴任务和比较任务来考察序贯比较在活动持续时间辨别中的作用。在分类任务中，参与者必须根据声调的持续时间(短与长)对声调进行分类。在比较任务中，他们必须为每个音调确定其长度是否与之前呈现的音调相匹配。我们使用对侧噪声程序来揭示在这些任务中左右听觉皮质的参与程度。我们发现，这两项任务都比右侧更强烈地涉及到左侧的听觉皮质。此外，在比较过程中，左侧听觉皮质比在分类过程中受到的影响更大。结合以前的研究，这表明在处理不同的基本声学参数过程中，对顺序比较的额外需求会导致左侧听觉皮质的招募增加。此外，比较任务更强烈地涉及到听觉皮质以外的几个脑区，这也可能与对声音进行更有效的分类相比，对额外认知资源的需求有关。(C)2017威利期刊公司。
Previous studies on active duration processing on sounds showed opposing results regarding the predominant involvement of the left or right hemisphere. Duration of an acoustic event is normally judged relative to other sounds. This requires sequential comparison as auditory events unfold over time. We hypothesized that increasing the demand on sequential comparison in a task increases the involvement of the left auditory cortex. With the current fMRI study, we investigated the effect of sequential comparison in active duration discrimination by comparing a categorical with a comparative task. During the categorical task, the participant had to categorize the tones according to their duration (short vs long). During the comparative task, they had to decide for each tone whether its length matched the tone presented before. We used the contralateral noise procedure to reveal the degree of participation of the left and right auditory cortex during these tasks. We found that both tasks more strongly involve the left than the right auditory cortex. Furthermore, the left auditory cortex was more strongly involved during comparison than during categorization. Together with previous studies, this suggests that additional demand for sequential comparison during processing of different basic acoustic parameters leads to an increased recruitment of the left auditory cortex. In addition, the comparison task more strongly involved several brain areas outside the auditory cortex, which may also be related to the demand for additional cognitive resources as compared to the more efficient categorization of sounds. (C) 2017 Wiley Periodicals, Inc.