Daniel Belyusar's profile

Look Here! Using EEG to Study Eye Movements

For my Ph.D. research, I used EEG to measure the brain when people moved their eyes. We were interested to discover if the brain responded the same when you are simply paying attention to something without looking at it, and when you choose to move your eyes. 
 
These data were published and presented previously.
In one experiment you had to move your eyes either toward, or away from a briefly flashed target.  
This is a composite video made with Adobe Premier based on averages of scalp EEG.
Combined timeline of Alpha dynamics. Showing the evolution of scalp topography of alpha brain waves between conditions. Red lines give relative position of gaze following the cue, along with key time points across the averaged epoch. Time ‘0’ is saccade onset. Note the distinguishable activation from the eye movements such that frontal and occipital activations are ipsilateral in the pro- condition, but contralateral in the anti- condition. 
Significant T-values in Pro- and Anti-Saccade Conditions. Statistical tests comparing Alpha-lateralization (left-right) for every channel (y-axis) at every time point (x-axis). Scale represents t-values and only those found to be significant at the p<.05 (corrected) level are shown. Time '0' is saccade onset. Highlighted regions shows area of interests: White= Stimulus-related covert attention; Green= additional lateralization in Anti-saccade; Grey= presumed Inhibition of Return. 
Source Analysis
These models are from a different experiment, but show the typical time course (A.) and electrode activations (B.) of an independent component extracted from one participant when they moved their eyes. Panel C shows the average calculated two-source model, projected within a standardized Montreal Neurological Institute (MNI) brain. This model accounts for 89% of the variance on average. 
Look Here! Using EEG to Study Eye Movements
Published:

Look Here! Using EEG to Study Eye Movements

For my doctoral dissertation I collected and combined EEG and eye-tracking data to determine if the same brain processes participated in shifting Read More

Published:

Creative Fields