Understanding electrodermal activity (EDA)


What is EDA?

Electrodermal activity is generated by the sweat glands on a microscopic level, and tends to increase with emotional and physical stimuli.


What affects it?

Several components can result in an elevated EDA, such as sports, excitement, and stress. In addition, your own individual biochemical levels also play a role. EDA can also fluctuate based on daily water intake and with certain medications. The measurements of electrodermal activity can be affected by skin hydration and where the sensors are placed. 


How do we measure it? 

Nerves transmit signals from the brain to the body. Because they lie directly under the skin, we can observe increases in the stress response by monitoring subtle electrical changes across the surface of the skin. 


What role does it play in our algorithm?

EDA is part of our algorithm but does not take precedence over other factors, given its susceptibility to variation. We’re analyzing characteristic EDA signatures during seizures so we can decrease the number of false alarms and refine Embrace’s algorithm.  

For a more in-depth explanation of EDA, you can check out our website.




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