 Facial electromyography

Recording electrical activity over facial muscle regions, such as the cheek and brow. It can detect small facial responses that are not obvious to an observer. A response compatible with a smile or frown does not by itself establish the corresponding subjective emotion.

Facial electromyography (EMG) is a diagnostic and research technique used to measure the electrical activity of facial muscles. It involves the use of electrodes placed on the skin surface over specific muscles to detect electrical signals generated by muscle contractions. This method is often employed in various fields such as psychology, neurology, and rehabilitation to study muscle function, facial expressions, and emotional responses.