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Extracting event-related field components through space-time ICA: a study of MEG recordings from children with ADHD and controls
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Demanuele, C., James, C. J., Capilla, A. and Sonuga-Barke, E. J. S. (2009) Extracting event-related field components through space-time ICA: a study of MEG recordings from children with ADHD and controls. In: 4th European Conference Of The International Federation For Medical And Biological Engineering, Antwerp, Belgium, Nov 23-27, 2008. Published in: IFMBE Proceedings, Vol.22 pp. 38-42. ISSN 1680-0737. doi:10.1007/978-3-540-89208-3_11
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Official URL: http://dx.doi.org/10.1007/978-3-540-89208-3_11
Abstract
Event-related studies have provided indirect evidence that Attention Deficit Hyperactivity Disorder (ADHD) children have abnormalities in signal detection and discrimination, and in information processing. Moreover, studies suggest that there exist very low frequency fluctuations modulating underlying neuronal events. This paper presents an event-related fields (ERF) study involving the analysis of magnetoencephalographic (MEG) recordings of children with ADHD and controls during selective attention and perceptual, stimuli-based tasks. A specific form of blind-source separation — space-time independent component analysis (ST-ICA) — is used to isolate the early M100 responses within the data, which are indicative of selective attention deficits. The properties of the extracted responses, namely the amplitude and latency, as well as the power spectral densities of their inter-trial variations are then analyzed. Preliminary results demonstrate the ability of ST-ICA to extract relevant components from multi-dimensional, noisy, ERF data, and reveal differences in the amplitude and latency variations of the M100 responses of the two groups.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||
| Journal or Publication Title: | IFMBE Proceedings | ||||
| Publisher: | International Federation for Medical and Biological Engineering | ||||
| ISSN: | 1680-0737 | ||||
| Book Title: | 4th European Conference of the International Federation for Medical and Biological Engineering | ||||
| Official Date: | 2009 | ||||
| Dates: |
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| Volume: | Vol.22 | ||||
| Page Range: | pp. 38-42 | ||||
| DOI: | 10.1007/978-3-540-89208-3_11 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 4th European Conference Of The International Federation For Medical And Biological Engineering | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Antwerp, Belgium | ||||
| Date(s) of Event: | Nov 23-27, 2008 |
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