[FieldTrip] auditory evoked gamma

[Peyman Adjamian]

Dear Nenad,
>From my experience, auditory gamma activity is not a robust effect, certainly not as prevalent and robust as the visual gamma activity which is best induced by high contrast stimuli at certain spatial frequencies. So whether you observe auditory gamma activity or not very much depends on your type of stimulus. Can I ask what auditory stimuli you are using to induce gamma activity?

Assuming that auditory gamma activity exists at all, and given that you use the appropriate stimulus, you should see it with DICS or some other beamformer. To avoid correlated sources, you can analyse right and left channels separately perhaps.
I hope this helps.

Peyman

==========================================================================
Dr Peyman Adjamian
Investigator Scientist
MRC Institute of Hearing Research
University Park
Nottingham
NG7 2RD
Tel: (0115) 922 3431
Fax: (0115) 951 8503
Email: peyman at ihr.mrc.ac.uk<mailto:peyman at ihr.mrc.ac.uk>



From: fieldtrip-bounces at science.ru.nl [mailto:fieldtrip-bounces at science.ru.nl] On Behalf Of Nenad Polomac
Sent: 07 March 2013 12:22
To: fieldtrip at science.ru.nl
Subject: [FieldTrip] auditory evoked gamma

Hi,

I would like to ask you for a suggestion about localisation o auditory evoked gamma osculations. I checked all tutorials and I haven't found much help. DICS beamformer doesn't work in this case.
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