RT Journal Article SR Electronic T1 ERS School Course Sleep Medicine: Non-respiratory causes of excessive daytime sleepiness JF Breathe JO Breathe FD European Respiratory Society SP 245 OP 249 DO 10.1183/18106838.0203.245 VO 2 IS 3 A1 V. Viot-Blanc YR 2006 UL http://breathe.ersjournals.com/content/2/3/245.abstract AB Educational aimsTo present the symptoms, methods of assessment and the different causes of excessive daytime sleepiness when nocturnal respiratory disturbances have been excluded.To enable physicians to confirm a diagnosis of sleepiness and recognise the pathology.Summary Excessive daytime sleepiness (EDS) is defined as an inability to stay awake and alert during the major waking episodes of the day, resulting in unintended drowsiness or sleep episodes almost daily for at least 3 months. This review will examine the assessment of sleepiness and different causes of EDS.