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DIFFERENTIAL CONTROL OF CARDIAC FUNCTIONS BY THE BRAIN

1 The idea is introduced that cardiac rate, contractility or atrioventricular (A‐V) conduction spread may be controlled independently by the brain. Limited data from reflex studies are cited to support this view. 2 Evidence is presented that individual autonomic post‐ and preganglionic neurons have quite specific actions on the heart. Premotor and other central neurons can have preferential actions on heart rate, contractility or A‐V conduction. 3 The functional implications of selective cardiac control are discussed.