Epilepsy is a tendency to recurrent seizures, though not everyone who has a seizure has epilepsy. Seizures range from purely subjective focal events to absences, complex partial seizures with impaired awareness, focal motor seizures and generalised convulsions, and any seizure involving loss of awareness, however brief, or loss of motor control can impair both Category 1 and Category 2 Safety Critical Work; sleep deprivation, common in shift work, is a recognised provoking factor. The management pathway for a worker who has had a seizure is set out in the Standard's figure and relies on specialist neurological opinion. The seizure-free periods in the criteria apply to Category 1 workers, for whom sudden collapse is the critical risk, and Table 16 sets when a worker is not Fit for Duty Unconditional and the conditions for Fit for Duty Subject to Review after a first seizure, with epilepsy controlled on treatment, on withdrawal or change of medication, after provoked seizures, for seizures only during sleep, and after epilepsy surgery, generally requiring defined seizure-free intervals, adherence to treatment and periodic specialist review. Category 2 workers are assessed individually according to seizure type and the demands of the job, since collapse does not by definition cause a serious incident but attentiveness may still be affected.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.