CAROTID SINUS AND AORTIC REFLEXES IN THE REGULATION OF CIRCULATION DURING SLEEP.

In the cat with intact sinoaortic reflexes, episodes of deep sleep are accompanied by marked falls in both systolic and diastolic blood pressure. The falls are much larger after bilateral sino-aortic deafferentation: to such low pressures during deep sleep that episodes of transient cerebral ischemia (electroencephalographic flattening and seizures) sometimes occur.