mne.preprocessing.cortical_signal_suppression#
- mne.preprocessing.cortical_signal_suppression(evoked, picks=None, mag_picks=None, grad_picks=None, n_proj=6, *, verbose=None)[source]#
Apply cortical signal suppression (CSS) to evoked data.
- Parameters:
- evokedinstance of
Evoked
The evoked object to use for CSS. Must contain magnetometer, gradiometer, and EEG channels.
- picks
str
| array_like |slice
|None
Channels to include. Slices and lists of integers will be interpreted as channel indices. In lists, channel type strings (e.g.,
['meg', 'eeg']
) will pick channels of those types, channel name strings (e.g.,['MEG0111', 'MEG2623']
will pick the given channels. Can also be the string values “all” to pick all channels, or “data” to pick data channels. None (default) will pick good data channels. Note that channels ininfo['bads']
will be included if their names or indices are explicitly provided.- mag_picksarray_like of
int
Array of the magnetometer channel indices that will be used to find the reference data. If None (default), all magnetometers will be used.
- grad_picksarray_like of
int
Array of the gradiometer channel indices that will be used to find the reference data. If None (default), all gradiometers will be used.
- n_proj
int
The number of projection vectors.
- verbose
bool
|str
|int
|None
Control verbosity of the logging output. If
None
, use the default verbosity level. See the logging documentation andmne.verbose()
for details. Should only be passed as a keyword argument.
- evokedinstance of
- Returns:
- evoked_subcorticalinstance of
Evoked
The evoked object with cortical contributions to the EEG data suppressed.
- evoked_subcorticalinstance of
Notes
This method removes the common signal subspace between the magnetometer data and the gradiometer data from the EEG data. This is done by a temporal projection using
n_proj
number of projection vectors. For reference, see [1].References
Examples using mne.preprocessing.cortical_signal_suppression
#
Cortical Signal Suppression (CSS) for removal of cortical signals