期刊
CEREBRAL CORTEX
卷 25, 期 11, 页码 4284-4298出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhu325
关键词
attention; cognitive control; functional mRI; right anterior insula; speech
资金
- Medical Research Council [G1100423]
- MRC [MR/K014129/1, G1100423] Funding Source: UKRI
- Medical Research Council [MR/K014129/1, G1100423] Funding Source: researchfish
Remembering what a speaker said depends on attention. During conversational speech, the emphasis is on working memory, but listening to a lecture encourages episodic memory encoding. With simultaneous interference from background speech, the need for auditory vigilance increases. We recreated these context-dependent demands on auditory attention in 2 ways. The first was to require participants to attend to one speaker in either the absence or presence of a distracting background speaker. The second was to alter the task demand, requiring either an immediate or delayed recall of the content of the attended speech. Across 2 fMRI studies, common activated regions associated with segregating attended from unattended speech were the right anterior insula and adjacent frontal operculum (aI/FOp), the left planum temporale, and the precuneus. In contrast, activity in a ventral right frontoparietal system was dependent on both the task demand and the presence of a competing speaker. Additional multivariate analyses identified other domain-general frontoparietal systems, where activity increased during attentive listening but was modulated little by the need for speech stream segregation in the presence of 2 speakers. These results make predictions about impairments in attentive listening in different communicative contexts following focal or diffuse brain pathology.
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