Vasomotor

(ya-zo-mo/ -tor) [vas, ve el; motor, from movere, to move]. Regulating the tension of blood ve els. V. Centers, centers situated in the medulla oblong at a and spinal cord, and governing the caliber of the blood-ve els. V. Nerves, the nerves pa ing to the blood-ve els; they are of two kinds, the vasoconstrictor (vasohypertonic) nerves, or those stimulation of which causes contraction of the blood-ve els, and the vasodilator (vasohypotonic) nerves, stimulation of which causes dilatation of the ve el. 652