Mapping the bilateral visual integration by EEG and fMRI
Open accessAbstract
In the human visual system, the internal representation of the left and right visual hemifields is split at the midline of the two cerebral hemispheres. The present study aims to address the questions of when and where the lateralized cortical visual representations are merged to form an intact percept by using a multimodal neuroimaging approach. Visual evoked potential (VEP) and functional magnetic resonance imaging (fMRI) data were acquired from a group of healthy subjects presented with unilateral versus bilateral visual stimuli. Cortical activities involved in processing bilateral visual information are expected to be equally responsive to ipsilateral and contralateral stimuli, and demonstrate spatial nonlinearity in the response to bilateral stimuli. Utilizing these features, we performed integrative as well as separate analyses for both VEP and fMRI data. The present results suggest that i) the majority of cortical activity that integrates visual information across hemifields takes place at extrastriate areas during late visual processing, and that ii) the lateral occipito-temporal (LOT) regions (likely the MT+ complex) and the medial occipital cortex (i.e. V1) may contribute to bilateral visual integration during early visual processing. Our findings are generally in agreement with the bottom-up visual hierarchy, with the exception of the evidence suggesting an early activation of the higher-tier LOT areas and the influence from ipsilateral visual inputs upon the V1 response.
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This relationship provides a quantitative model linking fMRI to EEG/MEG and allows a more principled use of fMRI to constrain the EEG/MEG inverse solution for stimulus-evoked responses.
“This relationship yields a quantitative model to relate fMRI to EEG/MEG, enabling a more principled way for using fMRI to constrain the EEG/MEG inverse solution for stimulus-evoked responses (150–152).”
From Electrophysiological source imaging: A noninvasive window to brain dynamics (2018) · cites this paper as [152]
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- Authors
- Liu, Z., Zhang, N., Chen, W., & He, B.
- Affiliations
- University of Minnesota (US)
- Corresponding author
- He, Bin
- Venue
- NeuroImage
- Publisher
- Elsevier BV
- Published
- 2009-07
- Volume
- 46
- Issue
- 4
- Pages
- 989-997
- ISSN
- 1053-8119 (ISSN-L)
- PMC
- PMC2702152
- OpenAlex
- W2028184770
- Cited by
- 37
- References
- 45
- Citations by year
- 2026: 1 · 2025: 3 · 2022: 1 · 2021: 2 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 2 · 2015: 1 · 2014: 3 · 2013: 2 · 2012: 5
- FWCI
- 2.10
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- NeuroImage (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion)
- Funders
- National Institutes of Health
- National Institute of Neurological Disorders and Stroke (P30NS057091)
- National Institute of Biomedical Imaging and Bioengineering (R01EB000178, EB00178, R01EB000329, EB00329, R01EB007920)
- National Center for Research Resources (P41RR008079)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Spatial Neglect and Hemispheric Dysfunction
- Life Sciences › Neuroscience › Cognitive Neuroscience › Face Recognition and Perception
- Keywords
- visual evoked potentials, functional MRI, extrastriate cortex, primary visual cortex, visual hierarchy, hemispheric lateralization, spatial nonlinearity
- MeSH terms
- Adult, Brain, Brain Mapping, Electroencephalography, Evoked Potentials, Visual, Female, Humans, Magnetic Resonance Imaging, Male, Visual Perception
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