[FieldTrip] Auditory N1 Localization

Paul Czienskowski paul_c at gmx.de
Sun Jul 31 13:33:15 CEST 2011

Dear all,

I am trying to localize auditory evoked N1 peaks with the 
ft_dipolefitting function and BEM models. Occasionally the fit performed 
quite well, in particular with the individual models, but sometimes it 
did not. I have found about a quarter of the fits with the individual 
models being quite insensible and about the half of the fits with an 
standard model. Insensible means either pairs of symmetric dipoles at 
virtually the same place or dipoles way too far away from the expected 
I have executed the fit with a grid defined by the grey matter from the 
SPM segmentations, restricted to one half of the interesting area - for 
I am fitting symmetric dipoles. And I used the subsequent non-linear search.

I would appreciate if someone had some idea on how I might increase the 
yield of the fitting.

Best regards and thanks in advance,
Paul Czienskowski

Paul Czienskowski
Björnsonstr. 25
12163 Berlin

Tel.: (+49)(0)30/221609359
Handy: (+49)(0)1788378772

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