[Eeglablist] Data Interpretation
Makoto Miyakoshi
mmiyakoshi at ucsd.edu
Mon Aug 30 09:44:18 PDT 2021
Dear Chanda,
Here is my initial impression.
1. The horizontal red and blue in the top-right plot indicates the data
is not high-pass filtered well. This is not very ideal for ICA.
2. The scalp topography shown in the top left plot indicates this
independent component (IC) most likely represents eye-related activity, but
see below.
3. The bottom power spectral density (PSD) plot shows a good 1/f curve,
which indicates this IC does not contain much electromyogram (EMG). Because
the top right plot does not show blink- or saccade-related activity, I
guess this data was recorded during eyes closed resting? There is a
possibility that this IC 1 reflects some frontal EEG activity, but
ICLabel() algorithm would say this is electrooculogram (EOG).
4. The PSD plot has low resolution--is the sampling rate high (500 or
1000 Hz?)
Makoto
On Sun, Aug 29, 2021 at 10:25 AM Chanda Steven via eeglablist <
eeglablist at sccn.ucsd.edu> wrote:
> Dear All,
>
> I am very new to quantitative EEG time series preprocessing, I wanted to
> ask how to interpret the data in the link attached continuous data figure
> and activity power spectrum figure?
>
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__ibb.co_V2NsktP&d=DwIBaQ&c=-35OiAkTchMrZOngvJPOeA&r=kB5f6DjXkuOQpM1bq5OFA9kKiQyNm1p6x6e36h3EglE&m=2lr9fZ_4eOkK7zYBE3qmXrbzIxsTZTpS0-qcDiXyISg&s=ktuKP12B-wxOa2OFXopJBPo31njfHatqTyWKeQ9Gw-I&e=
>
> Thank You,
> Chanda Simfukwe.
>
>
> --
> Chanda Simfukwe
> Ph.D. Candidate
> Artificial Intelligence and Data Science,
> Chung-Ang University Dept. Medicine,
> The Korea Republic of.
> ..........................................
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu
>
More information about the eeglablist
mailing list