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