Dear Jane,

The data and lead fields are rescaled as part of the inversion and the original physical units are not preserved. So if you just need a legend for your figure I would say 'arbitrary units'.

Best,

Vladimir

On Fri, Dec 2, 2016 at 3:28 AM, Jane Kouptsova <[log in to unmask]> wrote:
Dear all, 
I am hoping to clarify the units that spm_eeg_inv_extract() outputs when using it with MEG data. The description within the function itself reads: "Exports source activity using the MAP projector". Can I take this to mean that it is the amplitude of the signal that is output, and should therefore be in femtotesla?

Thank you very much,
Jane