Abstract: A method of aligning a wearable device having a set of neurophysiological sensors on a head of a subject, comprises capturing a three-dimensional (3D) facial image of the subject, and a 3D image of the wearable device while being placed on a scalp of the subject. Facial landmarks are identified on the facial image, and the images are co-registered based at least in part on the identified facial landmarks. A trained machine learning procedure is fed with the facial landmarks to produce coordinates of scalp landmarks, and an alignment of the wearable device on the scalp is corrected to match coordinates of the scalp landmarks with locations of the neurophysiological sensors.

Abstract: A system for measuring EEG signals, comprises a wearable body adapted to fit over a scalp, a plurality of electrodes mounted on the wearable body, and optionally also a plurality of controllable actuators for applying force to the electrodes. A controller optionally controls each actuator or group of actuators to apply force to at least one electrode. A signal processor receives and processes signals from the electrodes and optionally transmits control signals to the controller based on the processing.