Sensors in Brain-Computer Interfaces: Mapping the Mind in Motion Sensors are the gateway between brain activity and digital commands. These sensors are mainly involved in detecting brain signals. Broadly, sensors range from invasive, partially invasive, and noninvasive. This blog post is limited to discussing noninvasive sensors. Noninvasive BCIs record brain activity without surgery, making them safer and more accessible. The most common sensor is EEG, which uses scalp elect