Change detection in human auditory cortex. (360G-Wellcome-093292_Z_10_Z)

£137,436

The project consists of a series of brain imaging (MEG and fMRI) and psychophysics experiments based on a new paradigm designed to reveal the factors that determine listeners sensitivity to changes in an unfolding acoustic scene. Our stimuli contain unpredictable step-changes ( temporal edges ) in the pattern of fluctuation representative of a wide range of acoustic changes. By carefully manipulating stimulus statistics preceding and following the temporal edge and recording brain and behavio ural responses, we probe the cortical networks that underlie the detection of these events. Our findings to date have already provided important new insights about change processing in the human brain, previously unobserved with classical paradigms such as the mismatch negativity (MMN). Proposed experiments (1 fMRI, 6 MEG, and 2 psychophysics) are designed to broaden our understanding of the stimulus attributes and contextual factors that underlie change detection and sketch-out the processes involved: What acoustic factors does auditory cortex monitor to detect change? Which neural systems underlie change detection and what computations do they implement? How are they affected by the perceptual state of the listener (focus of attention and decision bias)? How is low-level change detection in auditory cortex used by listeners when making decisions about sound events?

Where is this data from?

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Grant Details

Amount Awarded 137436
Applicant Surname Chait
Approval Committee Cognitive and Higher Systems Funding Committee
Award Date 2010-10-07T00:00:00+00:00
Financial Year 2010/11
Grant Programme: Title Project Grant
Internal ID 093292/Z/10/Z
Lead Applicant Prof Maria Chait
Other Applicant(s) Prof Timothy Griffiths
Partnership Value 137436
Planned Dates: End Date 2014-09-30T00:00:00+00:00
Planned Dates: Start Date 2011-01-01T00:00:00+00:00
Recipient Org: Country United Kingdom
Region Greater London