Fig. 7. Cumulative occurrence for consciousness (straight line), unconsciousness (dashed line) described by the Observer's Assessment of Alertness/Sedation Scale (OAA/S; transition from level 3 to level 2) as a function of the (A ) Bispectral Index (BIS) and the (D ) A-Line Autoregressive Index (AAI). Cumulative occurrence for consciousness (straight line), unconsciousness (dashed line) described by presence–loss of eyelash reflex as a function of (B ) BIS and (E ) AAI. Cumulative occurrence for response (straight line), no response (dashed line) to noxious stimulus as a function of (C ) BIS and (F ) AAI.