Les variations de la vigilance et des processus attentionnels : leurs implications dans la conduite de système

This article deals with the problem of steep-wake cycles and sustained attention while driving Systems. Nowadays, because of night work, transmeridian displacements, or sustained activités over 24 hours, for soldiers or emergency units for example, the 24-hour cycle is no more taken into consideration in working rhythms. This fact has a human and financial cost: steep loss causes accidents, but also heart disease. After describing physiological bases of the sleep-wake cycle and sustained attention and the consequences of their fluctuations during high-risk Systems' driving, we wilt conclude in discussing different counter-measures to protect operators from these fluctuations.