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dc.contributor.authorWijeakumar, Sobanawartinyen_UK
dc.contributor.authorShahani, Umaen_UK
dc.contributor.authorMcCulloch, Daphne Len_UK
dc.contributor.authorSimpson, William Aen_UK
dc.description.abstractPURPOSE. The aim of our study was to investigate the correlation between neural and hemodynamic responses to stereoscopic stimuli recorded over visual cortex. METHODS. Test stimuli consisted of a static checkerboard (checks) and dichoptic static random dot (RD) presentations with no binocular disparity (ZD) or with horizontal disparity (HD). Hemodynamic responses were recorded from right and left occipital sites using functional near-infrared spectroscopy (fNIRS). Visual evoked potentials (VEPs) were recorded over three occipital sites to the onset of the same stimuli. RESULTS. Early components, N1 and P2, were sensitive to HD, suggesting that an enhanced N1-reduced P2 complex could be an indicator of binocular disparity and stereopsis. VEPs to checks and ZD stimulation were similar. fNIRS recordings showed changes in hemodynamic activation from baseline levels in response to all stimuli. In general, HD elicited a larger vascular response than ZD. Oxyhemoglobin concentration (HbO) was correlated with the VEP amplitude during the checks and HD presentations. CONCLUSIONS. We report an association between neural and hemodynamic activation in response to checks and HD. In addition, the results suggested that N1-P2 complex in the VEP could be a neural marker for stereopsis and fNIRS demonstrated differences in HbO. Specifically, checks and HD elicited larger hemodynamic responses than random dot patterns without binocular disparity.en_UK
dc.publisherAssociation for Research in Vision and Ophthalmology (ARVO)en_UK
dc.relationWijeakumar S, Shahani U, McCulloch DL & Simpson WA (2012) Neural and vascular responses to fused binocular stimuli: A VEP and fNIRS study. Investigative Ophthalmology and Visual Science, 53 (9), pp. 5881-5889.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.titleNeural and vascular responses to fused binocular stimuli: A VEP and fNIRS studyen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Wijeakumar_Investigative_Ophthalmology_and_Visual_Science_August_2012.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.citation.jtitleInvestigative Ophthalmology & Visual Scienceen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.funderGlasgow Caledonian Universityen_UK
dc.contributor.affiliationGlasgow Caledonian Universityen_UK
dc.contributor.affiliationGlasgow Caledonian Universityen_UK
dc.contributor.affiliationGlasgow Caledonian Universityen_UK
dc.contributor.affiliationUniversity of Plymouthen_UK
Appears in Collections:Psychology Journal Articles

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