[Eeglablist] dry electrodes

[Cedric Cannard]

Hi Ettore,

Dry electrodes are very common these days, because they greatly facilitate data collection. However, there can be great SNR loss depending on the headsets. There are also various hardware differences that can impact the signal. There is tons of resources online on this topic, for example:

https://urldefense.com/v3/__https://www.brainlatam.com/blog/wet-dry-active-and-passive-electrodes.-what-are-they-and-what-to-choose-413__;!!Mih3wA!By0ac_M9bHGakTDbSlc9T7RVo7UncvUnYn2NL1n_4nKeEP45MWwhtUaSsskAyoa06enO_FXMlDABRRNQ-ABg9u94Sw$ 

https://urldefense.com/v3/__https://sapienlabs.org/lab-talk/wet-and-dry-electrodes-for-eeg/__;!!Mih3wA!By0ac_M9bHGakTDbSlc9T7RVo7UncvUnYn2NL1n_4nKeEP45MWwhtUaSsskAyoa06enO_FXMlDABRRNQ-ABlV4vPvQ$ 

https://urldefense.com/v3/__https://www.nature.com/articles/s41598-020-62154-0__;!!Mih3wA!By0ac_M9bHGakTDbSlc9T7RVo7UncvUnYn2NL1n_4nKeEP45MWwhtUaSsskAyoa06enO_FXMlDABRRNQ-ABjvK04Kg$ 

https://urldefense.com/v3/__https://wearablesensing.com/dry-electrode/__;!!Mih3wA!By0ac_M9bHGakTDbSlc9T7RVo7UncvUnYn2NL1n_4nKeEP45MWwhtUaSsskAyoa06enO_FXMlDABRRNQ-ACPBYocpw$ 

See references on these pages too.

Cedric



------- Original Message -------
On Friday, May 5th, 2023 at 12:05 PM, Hanna Szakács via eeglablist <eeglablist at sccn.ucsd.edu> wrote:


> Hi Ettore,
> 
> Dry electrodes are frequently used in sleep studies, specifically the Dreem
> headband. There are some pros, e.g. they are simpler to use, even for
> non-researchers, and thus can be taken home by the participants. It's much
> easier to recruit participants if they can take the device home and sleep
> in their own beds while wearing it. I would say it provides more valid data
> too, as sleeping at a new place (such as a sleep lab) is difficult for some
> people and can give misleading data.
> The con with this headband specifically is that it mostly collects data
> from the frontal and occipital regions, which is very limited. We can't see
> what goes on on the other parts of the scalp, so a lot of potentially
> valuable data is lost. Also, the headband can move around because the
> subject moves and turns in their sleep, so it might end up much noisier
> than a regular EEG cap would.
> Hanna
> 
> Ettore Coppola via eeglablist eeglablist at sccn.ucsd.edu ezt írta (időpont:
> 
> 2023. máj. 2., K, 23:55):
> 
> > I don’t know if this question is off-topic!
> > Have you some experiences with dry electrodes? What is your opinion?
> > Thank you and ... sorry for my bad English!
> > Ettore
> > 
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