Understanding the importance of electrodermal activity (EDA)


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

Spikes in EDA have been shown to be correlated with convulsive seizures. Therefore, using EDA in our event detection algorithm, can make it more accurate and decrease false alarms.


What affects EDA?

Several factors can raise your EDA, such as sports, excitement, and stress. In addition, your biochemical levels also play a role. EDA can also fluctuate based on daily water intake and with certain medication. The measurements of EDA can be affected by skin hydration, and where the sensors are placed. For a more in-depth explanation of EDA, you can check out our website.


How does Embrace measure EDA?

Our 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 EDA play in Empatica’s detection algorithm?

EDA is part of our algorithm, but does not take precedence over other factors, such as movement, because it can easily vary.  We’re analyzing characteristic EDA signatures during seizures to decrease the number of false alarms and refine Embrace’s algorithm.  




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