Re: [AUDITORY] EEG Auditory Gamma Responses

[Vibha Viswanathan <vibha.viswana@xxxxxxxxx>]

Hi Burcu,

You're right that it's challenging to measure gamma effects with EEG. We have had some success measuring slow gamma-power fluctuations (gamma envelopes) that are phase locked to the low-frequency information in the input stimulus (specifically, speech). I should mention though that the gamma-band effects we saw were much weaker (although statistically significant) compared to low-frequency EEG responses (our 2019 paper has the analysis details).

Hope this helps!

Vibha

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Vibha Viswanathan

Graduate Student Researcher

Purdue University

 

On Thu, Mar 4, 2021 at 12:28 AM Burcu Bayram <burcu.bayram@xxxxxxxxxxxx> wrote:

Hello,

I am a new PhD student working on a project investigating auditory
predictions. We would like to look into prediction error related gamma
band activity using EEG. Since EEG seems to be regarded suboptimal for
detecting auditory responses (especially gamma) I would appreciate very
much if anyone could share their experience and suggestions, for
instance regarding optimal stimulus properties or analysis approaches
(e.g. source localization). I am familiar with most of the published
work, but would also be very interested in potential experience from
unpublished or pilot data.

Best,
Burcu Bayram