Change search
ReferencesLink to record
Permanent link

Direct link
Linköping University, Department of Computer and Information Science.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

It is a challenging task for researchers to determine how the brain solves multisensory perception, and the neural mechanisms involved remain subject to theoretical conjecture.  According to a hypothesised cortical model for natural audiovisual stimulation, phase synchronised communications between participating brain regions play a mechanistic role in natural audiovisual perception.  The purpose of this study was to test the hypothesis by investigating oscillatory dynamics from ongoing EEG recordings whilst participants passively viewed ecologically realistic face-speech interactions in film.  Lagged-phase synchronisation measures were computed for conditions of eye-closed rest (REST), speech-only (auditory-only, A), face-only (visual-only, V) and face-speech (audio-visual, AV) stimulation. Statistical contrasts examined AV > REST, AV > A, AV > V and AV-REST > sum(A,V)-REST effects.  Results indicated that cross-communications between the frontal lobes, intraparietal associative areas and primary auditory and occipital cortices are specifically enhanced during natural face-speech perception and that phase synchronisation mediates the functional exchange of information associated with face-speech processing between both sensory and associative regions in both hemispheres.  Furthermore, phase synchronisation between cortical regions was modulated in parallel within multiple frequency bands.  

Place, publisher, year, edition, pages
2015. , 44 p.
Keyword [en]
EEG, Phase, Synchronisation, Coherence, Multisensory, Face, Speech, Processing, LORETA, Audiovisual, Perception, Oscillations, Neural
National Category
Neurosciences Human Computer Interaction
URN: urn:nbn:se:liu:diva-122825ISRN: LIU-IDA/KOGVET-A--15/014--SEOAI: diva2:874117
Subject / course
Cognitive science
2015-06-02, Grace Hopper, Linköping University, Linköping, 13:45 (English)
Available from: 2015-11-30 Created: 2015-11-25 Last updated: 2015-11-30Bibliographically approved

Open Access in DiVA

fulltext(1290 kB)39 downloads
File information
File name FULLTEXT01.pdfFile size 1290 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Blomberg, Rina
By organisation
Department of Computer and Information Science
NeurosciencesHuman Computer Interaction

Search outside of DiVA

GoogleGoogle Scholar
Total: 39 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 66 hits
ReferencesLink to record
Permanent link

Direct link