AwarenessConsciousnessSubliminal StimulationUnconscious (Psychology)FaceVisual PerceptionFacial ExpressionPhotic StimulationElectroencephalographyReaction TimeAttentionMemoryMagnetic Resonance ImagingPsychomotor PerformanceBrainConscious SedationIntraoperative AwarenessHealth Knowledge, Attitudes, PracticeDogsBlood PressureHeart RatePersistent Vegetative StateHemodynamicsQuestionnairesUnconsciousnessTelemetryInjections, Intraventricular