Rapid phase (baroreceptor feedback mechanism(baroreceptor reflex)(carotid sinus, aorta) 2 the chemoreceptor mechanism(chemoreceptor reflex)(carotid body, aortic body) central nervous system ischemic mechanisms 160 858 Reduction of blood supply 16’32 Time after the treatment CNS ischemic responseRapid phase: ① baroreceptor feedback mechanism (baroreceptor reflex) (carotid sinus, aorta) ② the chemoreceptor mechanism (chemoreceptor reflex) (carotid body, aortic body) ③ central nervous system ischemic mechanisms