Dear Bitalino community,
I am a computer science student who is working on a sensor device using the Bitalino EDA 151015.
I: Signal in the data sheet
For the first step I would like to reproduce the signal given in the data sheet. On the Bitalino Admins already gave me the information that the vasalva maneuver was used for this. As far as I understood the maneuver on closes his/her own nose and mouth and then exhales intensively for a period of 10 seconds. While doing this a doctor would check your ears.
As the signal is shown over a period of 100 seconds I would like to know if there was a repetition of the maneuver, if there were some rest periods and (if possible) the timestamps for starting and/or beginning of each maneuver.
II: Positioning of the electrodes
The data sheet mentions the thenar eminence as electrode positions. Also the index finger and middle or third finger are mentioned here: viewtopic.php?f=3&t=135
Poh et al. (http://web.media.mit.edu/~zher/papers/Poh-etal-TBME.pdf
) mentioned the wrist as a valid position for recording eda. It is also mentioned that to detect EDA a current is applied to the skin beneath the two electrodes. Now I have two questions:
1. Is it possible to detect EDA using the Bitalin EDA 151015 with electrodes placed at the wrist as shown in the paper by Poh et al.?
2. How does the Bitalino EDA 151015 apply current to the skin to detect EDA?
Thank you very much, I am curious to read some answers.