[FieldTrip] units of lcmv source-localized activity

[Schoffelen, J.M. (Jan Mathijs)]

Hi Lin,

If the gradiometer positions (and headmodel and sourcemodel positions) are expressed in meters, and the sensor data in T, then I would assume that the virtual channel units are Am, under the further assumption that you have been using a ’normal’ lcmv algorithm without any normalization of the weights, and that you are looking at the mom field of the source output.

Best wishes,
Jan-Mathijs


> On 10 May 2021, at 21:11, Lin Wang <wanglinsisi at gmail.com> wrote:
> 
> Dear FieldTrip experts,
> 
> I used lcmv to project single-trial MEG signals (obtained with CTF system) from sensor space to source space, and I got values at a scale of 10e-5. I'm wondering what's the unit for such activity. It doesn't seem to match nAm.
> 
> Thank you for your help!
> 
> Lin
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