Abstract:
:Automatic detection of environmental change is a core component of attention. The mismatch negativity (MMN), an electrophysiological marker of this mechanism, has been studied prominently in the auditory domain, with cortical generators identified in temporal and frontal regions. Here, we combined electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) to assess whether the underlying frontal regions associated with auditory change detection also play a role in visual change detection. Twenty healthy young adults completed a visual MMN task in separate EEG and fMRI sessions. Region of interest analyses were conducted on left and right middle frontal (MFG) and inferior frontal (IFG) gyri, i.e., the frontal areas identified as potential auditory MMN generators. A significant increase in activation was observed in the left IFG and MFG in response to blocks containing deviant stimuli. These findings suggest that a frontal mechanism is involved in the detection of change in the visual MMN. Our results support the notion that frontal mechanisms underlie attention switching, as measured via MMN, across multiple modalities.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Hedge C,Stothart G,Todd Jones J,Rojas Frías P,Magee KL,Brooks JCdoi
10.1016/j.bbr.2015.07.022subject
Has Abstractpub_date
2015-10-15 00:00:00pages
173-81eissn
0166-4328issn
1872-7549pii
S0166-4328(15)30093-0journal_volume
293pub_type
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