ROLE OF THE CENTRAL NERVOUS SYSTEM IN THE BODY TEMPERATURE-ARTERIAL PRESSURE RELATIONSHIP

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Abstract
An increase or decrease in the body temp, of the turtle results in covariance of the systemic arterial blood pressure. Changes persist for periods of at least 3 hrs., if the body temp, is kept constant. At higher temps. (38-40[degree]C) the pressure is not maintained, but falls to low levels and death ensues. Section of the vagi has no effect on the relationship. Destruction of the brain or section of the cervical spinal cord at the occiput results in a fall in pressure to about 16/11 mm. Hg. After this procedure, warming or cooling of the animal no longer results in a change in blood pressure. These expts. are considered as evidence for the dependence of the temp.-pressure relationship on the central nervous system.