diff --git a/src/04-modality-specific-files/03-electroencephalography.md b/src/04-modality-specific-files/03-electroencephalography.md index 0f15a4dead..b29ee2c140 100644 --- a/src/04-modality-specific-files/03-electroencephalography.md +++ b/src/04-modality-specific-files/03-electroencephalography.md @@ -198,8 +198,10 @@ about the channels. Note that electrode positions SHOULD NOT be added to this file, but to [`*_electrodes.tsv`](./03-electroencephalography.md#electrodes-description-_electrodestsv). Furthermore, the entries in `*_electrodes.tsv` and `*_channels.tsv` do not have to match exactly, as for example in the case of recording a single `EOG` channel from a bipolar referencing scheme -of two electrodes. +of two electrodes, or a data channel originating from an auxilliary, non-electrode device. That is, in most cases `*_electrodes.tsv` will have more entries than `*_channels.tsv`. +See the examples for `*_channels.tsv` below, and for `*_electrodes.tsv` in +["Electrodes description"](./03-electroencephalography.md#electrodes-description-_electrodestsv). The columns of the Channels description table stored in `*_channels.tsv` are: @@ -252,14 +254,16 @@ Example of free-form text for field `description` - n/a, stimulus, response, skin conductance, battery status -Example: +### Example `channels.tsv` + +See also the corresponding [`electrodes.tsv` example](#example-electrodestsv). ```Text -name type units description status status_description -VEOG VEOG uV n/a good n/a -FDI EMG uV left first dorsal interosseous good n/a -Cz EEG uV n/a bad high frequency noise -UADC001 MISC n/a envelope of audio signal good n/a +name type units description reference status status_description +VEOG VEOG uV left eye VEOG-, VEOG+ good n/a +FDI EMG uV left first dorsal interosseous FDI-, FDI+ good n/a +Cz EEG uV n/a REF bad high frequency noise +UADC001 MISC n/a envelope of audio signal n/a good n/a ``` ## Electrodes description (`*_electrodes.tsv`) @@ -290,15 +294,19 @@ SHOULD be present: | material | RECOMMENDED | Material of the electrode (for example, Tin, Ag/AgCl, Gold). | | impedance | RECOMMENDED | Impedance of the electrode, units MUST be in `kOhm`. | -Example: +### Example `electrodes.tsv` + +See also the corresponding [`electrodes.tsv` example](#example-channelstsv). ```Text -name x y z type material -A1 -0.0707 0.0000 -0.0707 clip-on Ag/AgCl -F3 -0.0567 0.0677 0.0469 cup Ag/AgCl -Fz 0.0000 0.0714 0.0699 cup Ag/AgCl -REF -0.0742 -0.0200 -0.0100 cup Ag/AgCl -GND 0.0742 -0.0200 -0.0100 cup Ag/AgCl +name x y z type material +VEOG+ n/a n/a n/a cup Ag/AgCL +VEOG- n/a n/a n/a cup Ag/AgCL +FDI+ n/a n/a n/a cup Ag/AgCL +FDI- n/a n/a n/a cup Ag/AgCL +GND -0.0707 0.0000 -0.0707 clip-on Ag/AgCl +Cz 0.0000 0.0714 0.0699 cup Ag/AgCl +REF -0.0742 -0.0200 -0.0100 cup Ag/AgCl ``` The [`acq-