The sensors of the Embrace are embedded in the three aluminum protrusions underneath the device where it should touch the skin. The sensors are what the Embrace uses to detect and measure physiological activity for seizure detection and activity monitoring.
Embrace is comprised of the following sensors:
1) EDA sensor: measures the constantly fluctuating changes in certain electrical properties of the skin, resulting from sweat secretion and sweat gland activity. EDA is activated by regions deep in the brain involved in emotion such as fear, anxiety and positive excitement. Therefore, EDA is strongly activated during several types of seizures.
2) Accelerometer: detects motion and orientation.
3) Gyroscope: measures rotation and angular momentum.
4) Peripheral Temperature Sensor: measures skin surface temperature.