Investigating the Relationship Between Visual Evoked Potential and Gamma Band Activity
Author Information
Author(s): Camillo Porcaro, Dirk Ostwald, Avgis Hadjipapas, Gareth R. Barnes, Andrew P. Bagshaw
Primary Institution: Institute of Neuroscience, Newcastle University
Hypothesis
Are the Visual Evoked Potential (VEP) and Gamma Band Activity (GBA) generated by the same neuronal populations?
Conclusion
The study suggests that the VEP and GBA may be generated by the same neuronal populations, indicating a potential mediator role in the correlation between VEP and BOLD effect measured with fMRI.
Supporting Evidence
- ICA and FSS are able to extract sources specifically related to the VEP/P100 and GBA.
- Localisation and frequency analyses show co-dependencies between VEP/P100 and GBA.
- Trial by trial induced GBA covaries with VEP amplitude.
- VEP and GBA may be generated by the same neuronal populations.
- VEP and GBA relationship may underlie the relationship between VEP and BOLD.
Takeaway
This study looked at how two brain signals, one related to vision and the other to brain activity, might be connected. It found that they could come from the same brain cells.
Methodology
Blind (Independent Component Analysis—ICA) and semi-Blind (Functional Source Separation—FSS) methods were applied to dense array EEG data recorded during checkerboard stimulation.
Limitations
The study had a small sample size and focused only on specific visual stimuli.
Participant Demographics
Four subjects (1 female, age range 26–33) were included in the study.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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