There is provided a method and apparatus for monitoring a subject. A sequence of sensor signals associated with an environment of the subject is acquired from at least one sensor signal. The acquired sequence of sensor signals is compared to at least one stored sequence of sensor signals. The stored sequence of sensor signals comprise one or more features associated with an activity. A stored sequence of sensor signals comprising one or more features that match features of the acquired sequence of sensor signals is identified. It is detected whether the subject performs the activity associated with the one or more features of the identified sequence of sensor signals. A failure of the subject to perform the activity is indicative of a memory loss event. A notification is output where the subject fails to perform the activity.
