期刊
NEUROREPORT
卷 19, 期 2, 页码 151-154出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/WNR.0b013e3282f42509
关键词
cross-modal; deactivation; default mode; difficulty; multisensory
资金
- NIBIB NIH HHS [EB004673] Funding Source: Medline
- NINDS NIH HHS [NS044149] Funding Source: Medline
Blood oxygen-level-dependent signal decreases relative to baseline (deactivations) can occur with stimulation of an opposing sensory modality. Here, we show the importance of the difficulty of an auditory task on the deactivation of visual cortical areas. Participants performed an auditory temporal-order judgment task in conjunction with sparse-sampling functional MRI at both moderate and high levels of difficulty (adjusted for each individual's own threshold). With moderate difficulty, small deactivations were observed not only in parietal and cingulate cortex, but occipital cortex as well. When the same task was more difficult, deactivations increased significantly to include a greater extent of functionally defined visual cortex. Together, these results suggest that cross-modal deactivations occur in compensation for task difficulty, perhaps acting as an intrinsic filter for nonrelevant information.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据