title: Orienting and defensive responses to visual stimuli.
mesh_terms: D000293:Adolescent; D000328:Adult; D001007:Anxiety; D001143:Arousal; D003214:Conditioning, Classical; D005239:Fear; D005260:Female; D005712:Galvanic Skin Response; D006339:Heart Rate; D006801:Humans; D009949:Orientation; D010698:Phobic Disorders; D011336:Probability; D011674:Pulse; D013112:Spiders; D014666:Vasomotor System / Q000502:physiology; D014796:Visual Perception