THE LIBERATION OF A PRESSOR HORMONE FOLLOWING STIMULATION OF THE HYPOTHALAMUS

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Abstract
In cats whose spinal cord had been transected at the level of C7 or C8 for 2 or 3 mos. stimulation of the ant. hypothalamus yielded pronounced and sustained pressor effects. The long latent period, the slow rise of the blood pressure to maximum and its persistence after vagatomy further exclude the possibility that it is of a nervous origin, or due to circulating sympathin or adrenin. An activation of the hypophysis is therefore presumed and the effect is accounted for by the liberated pressor hormone from the post. lobe of the pituitary gland.

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