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This lecture delves into wearable low power sensor technology, focusing on biosignals and biosensors such as Pulse Oximetry, EEG, EMG, and Blood Pressure. Pulse oximetry measures oxygen levels in the blood using light absorption, while EEG records brain electrical activity with high temporal resolution. EMG is used to monitor muscle activation, and blood pressure monitoring is crucial for cardiovascular health. The lecture also covers the importance of EEG in various medical applications and the development of wireless EEG brain-machine interfaces.