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Evoked Multisensory Cortical Representations During Unisensory Stimulation
Linköping University, Department of Computer and Information Science. Linköping University, Faculty of Arts and Sciences.
2013 (English)Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
Abstract [en]

The primary aim of this study was to establish whether redintegrative effects can be revealed under conditions with complex sensory stimulation.  Specifically, would the cortical activity involved in the single-trial, passive encoding of a movie, be reactivated when subsequently exposed to a unisensory component of that movie, e.g. an audio- or visual-only segment?  High-density electrical neuroimaging analysis in the frequency domain was used to assist this aim.  The statistical comparisons revealed a greater number of oscillating neuronal regions across all frequency bands in participants who received audiovisual stimulation prior to unisensory exposure (compared to participants who experienced the same unisensory stimulus without prior audiovisual stimulation).   This difference between groups was significant in the alpha2 (right frontal lobe) and gamma (right frontal, sub-lobar and temporal lobes) frequencies during audio-only stimulation.    This enhanced cortical activity during unisensory stimulation suggests that participants were retrieving associated memory traces from their prior multisensory experience, although specific redintegrative effects could not be confirmed.

Place, publisher, year, edition, pages
2013. , 33 p.
Keyword [en]
cognition, memory, multisensory, unisensory, redintegration, episodic, retrieval, film, EEG, Electroencephalography, LORETA, eLORETA
National Category
Human Computer Interaction
URN: urn:nbn:se:liu:diva-94341ISRN: LIU-IDA/KOGVET-G--13/021--SEOAI: diva2:632220
Subject / course
Cognitive science programme
Available from: 2013-06-25 Created: 2013-06-24 Last updated: 2013-06-25Bibliographically approved

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Department of Computer and Information ScienceFaculty of Arts and Sciences
Human Computer Interaction

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