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Several recent studies have used fMRI to demonstrate the powerful effects of attention in the precise region of primary visual cortex where the critical stimulus is processed
Testing cognitive models of visual attention with fMRI and MEG.
Neuropsychologia, no. 12 (2001): 1329-1342
Neuroimaging techniques can be used not only to identify the neural substrates of attention, but also to test cognitive theories of attention. Here we consider four classic questions in the psychology of visual attention: (i) Are some ‘special’ classes of stimuli (e.g. faces) immune to attentional modulation?; (ii) What are the informatio...More
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- The authors can select which stimuli will be analyzed in detail and will be allowed to guide the behavior, making them active participants in the construction of the own perceptual experience.
- Efforts to understand attention have recruited every method in the toolbox of cognitive neuroscience.
- This enterprise has led to a wealth of new insights into questions that have been at the heart of attention research since the 1950s and 1960s.
- In this chapter we review recent work from our laboratory using fMRI and MEG to address four key issues concerning visual selective attention
- Attentional modulation of a stimulus could in principle take place at any stage in visual processing; how early does it occur when the stimuli are faces? While this question has been addressed in the domain of spatial selection using ERP , we briefly describe an MEG experiment demonstrating relatively early modulation of face processing that can not be due to spatial orienting
- We illustrated how the approach developed here can go beyond showing the effects of attention on stimulus representation, to reveal the common mechanisms involved in a wide variety of attentionally-demanding tasks
- Several recent studies have used fMRI to demonstrate the powerful effects of attention in the precise region of primary visual cortex where the critical stimulus is processed [33,75,77]
- Recent evidence suggesting the existence of human-voice specific regions of auditory cortex  could serve as the analogue of the fusiform face area and parahippocampal place area in studies of auditory attention
- The authors have used fMRI and MEG markers of face processing, and fMRI markers of place processing, as online measures of the effects of selective attention on visual information processing.
- These studies revealed converging evidence for attentional modulation of face processing, and showed that this modulation, at least in some circumstances, can occur relatively early in the processing sequence.
- There are many similarities between the methods developed here and single-unit neurophysiology, with the region of interest playing the role of the single neuron
- Portions of this research were supported by a Human Frontiers grant to NK
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