Abstract
For the purpose of searching the mechanism of the central nervous system on essential hypertension, that is, the effect of the central nervous system on change of blood pressuee, the electroencephalogram, blood pressure, GSR, eye movement, breathing, body temperature, pulse wave and electrocardiogram were examined simultaneously and continuously during natural sleep of 18 essential hypertensive patients and 9 people of normal blood pressure, 27 persons in all, and by making polygraph, each correlation was examined. The result indicated that in essential hypertensive patients, pulse, pulse wave, breath and body temperature changed as well as the change in blood pressure caused by a marked drop of blood pressure which run parallel with the depth of sleep of electroencephalogram. GRS, on the other hand, showed correlation opposite to any of those, and at the same time, when the sleep was deep, in both frequency and amplitude, it was predominant in the back of hands. Also in paradoxical sleep, in eye movements, there appeared rapid eye movement and in blood pressure at the same time, change of around 10 mmHg occurred minutely. In the same way, during this period, pulse and breath increased. GSR becomes of small frequency. Blood pressure of people of normal blood pressure decreases, but the degree of decrease was not clear. When they become modelately deep sleep, the degree of decrease of blood pressure becomes smaller and indicated marked difference from that of essential hypertnsive patients. Also in pulse, pulse wave, breath, body temperature, GSR and electrocardiogram, they showed the same change as those of what essential hypertensive patients showed, but the result indicated that all of these changes were not so remarkable as those of essential hypertensive patients.
In view of those facts, it was considered that in the central nervous system there is homeostasis related to blood pressure and this is involved in formation of blood pressure rhythm.
