Abstract: A method for monitoring a subject, includes: capturing high-bandwidth data pertaining to the subject; cyclically storing a recent portion of the high-bandwidth data in a first memory; monitoring one or more physiological signals of the subject; analyzing the monitored physiological signals to allow detection of one or more target events; upon detection of a target event: copying a then recent portion of the high-bandwidth data from the first memory to a second memory; and storing high-bandwidth captured in a predetermined period subsequent to the detection in the second memory. The one or more physiological signals include EEG. The one or more target events include epileptic seizures. A computer program product and a system may use the method.