Cochlear implant artifact reduction: This dataset is from a 37 female with bilateral CIs. We tested her RIGHT CI while the LEFT CI was turned off. No electrode gel was applied over electrodes: e46, e49, e57, e58 and e63. The stimulus was presented in free-field and was a continuous tone (250 Hz) that changed to 500 Hz (100% change, lasting 400 ms) every 2 secs. This is trigger S1. Raw files: 37F_CI022_visit5_DF_250_100p_p 37F_CI022_visit5_DF_250_100p_p_run2 37F_CI022_visit5_DF_250_100p_p_run3 37F_CI022_visit5_DF_250_100p_p_run4 37F_CI022_visit5_DF_250_100p_p_run5 Step 1 is to append all these files together Step 2 is to remove to electrodes that were directly over the CI (i.e., no electrode gel as applied to these) Step 3 is to resample the data to 500 Hz AD Step 4 is to filter the data 1 to 50 Hz Step 5 is to run ICA Step 6 is to remove “standard artifacts” (i.e., eye blink, horizontal eye movements, EKG…) Step 7 is to identify and remove CI artifacts Step 8 is to perform an average reference Step 9 is to interpolate the missing electrodes Files: Appended file: 37F CI022 DF 250 runs1to5.set CI electrodes removed, resampled and filtered: 37F CI022 DF 250 runs1to5 500 Hz AD remove CI elect.set The above file after ICA was run: 37F CI022 DF 250 runs1to5 500 Hz sampling ICA.set Electrode Names:
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Cochlear implant artifact reduction - CI Brain Labcibrainlab.com/IERASG/CI dataset ICA.pdfSave as “37F CI022 DF 250 removed regular artifacts.set” Lets extract the epochs, removed
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Cochlear implant artifact reduction:
This dataset is from a 37 female with bilateral CIs. We tested her RIGHT CI while the LEFT CI was turned
off. No electrode gel was applied over electrodes: e46, e49, e57, e58 and e63.
The stimulus was presented in free-field and was a continuous tone (250 Hz) that changed to 500 Hz
(100% change, lasting 400 ms) every 2 secs. This is trigger S1.