title: Influence of auditory or visual warning on visual reaction time with variations of subjects' alertness.
abstract: The purpose of the study was to determine the effect of visual and auditory warning on visual reaction time with variations of subjects' alertness. An experimental group of 30 subjects was tested with an auditory or visual warning signal; foreperiods lasted 3, 2, and 4 sec. Reaction time was shorter as alertness improved and with an auditory warning signal. Comparable measures in a control group showed that visual reaction time was shorter when an auditory warning signal was used.
mesh_terms: D000328:Adult; D000368:Aged; D000768:Anesthesia, General; D001143:Arousal / Q000187:drug effects*; D001288:Attention / Q000187:drug effects; D001307:Auditory Perception / Q000187:drug effects*; D004737:Enflurane; D005260:Female; D006801:Humans; D007530:Isoflurane; D008297:Male; D008875:Middle Aged; D011930:Reaction Time / Q000187:drug effects*; D014796:Visual Perception / Q000187:drug effects*; D014851:Wakefulness / Q000187:drug effects
chemical_list: D004737:Enflurane; D007530:Isoflurane