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Human brain activity during selective and divided auditory and visual attention| old_uid | 11696 |
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| title | Human brain activity during selective and divided auditory and visual attention |
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| start_date | 2012/10/08 |
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| schedule | 11h-12h30 |
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| online | no |
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| summary | Studies applying positron emission tomography or functional magnetic resonance imaging have shown that during auditory and visual selective attention, activity is enhanced in prefrontal and parietal cortical areas involved in attentional tuning of modality-specific areas. However, there is little or no such activity during highly trained tasks such as reading or selective listening to a particular speaker (Alho et al. Cogn. Brain.Res. 2003, Brain Res. 2006). Moreover, our results in the auditory modality (Salmi et al. Brain Res. 2009) show that, unlike in the visual modality (cf. Corbetta & Shulman, Nat. Neurosci. 2002), there is marked overlap between prefrontal, parietal, and modality-specific areas activated by voluntary orienting of attention and by involuntary attention to task-irrelevant sounds. Our results also indicate enhanced prefrontal and parietal activity during division of attention between auditory and visual phonological and spatial tasks (Salo et al. in preparation) and during selective attention to one of two simultaneous dichotic speech sounds (Westerhausen et al. Neuropsychologia, 2010). Our related magnetoencephalographic study suggests that the so-called right-ear advantage typically observed during divided attention to dichotic speech is caused by a rightward bias of attention (Alho et al. Brain Res. 2012). |
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| responsibles | Rämä, Izard |
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