1. A medical device, comprising: a body data module configured to receive body data from a patient; a work level data module configured to determine a first work level for the patient during a first time period, and a second work level for the patient during a second time period; a work level excursion module configured to: determine whether the second work level exceeds the first work level by an amount greater than a first work level excursion threshold which indicates that the second work level has a current body signal value which is incommensurate to an expected body signal value range for the second work level; and detect a work level excursion based upon the determination that the current body signal value for the second work level is incommensurate to the expected body signal value range for the second work level which indicates an epileptic seizure event; and a controller configured to perform at least one of generating a warning of the epileptic seizure event, providing a therapy for the epileptic seizure event, or logging an occurrence of the epileptic seizure event, in response to detecting the work level excursion.