The present application relates to systems and methods for altering the core body temperature in a mammalian body. For example, a method may include maintaining the patient in a general anesthetic state by administration of at least an anesthetic agent to the patient, wherein the anesthetic agent prevents vasoconstriction of AVAs in the patient's glabrous tissue. The method may also include applying a warming stimulus selectively to glabrous tissue of the hands, feet or face of the patient during the general anesthetic maintenance. In another exemplary method, the vasodilation of AVAs in the patient is triggered via a physical stimulus; the glabrous tissue of the patient is warmed; general anesthesia is administered to the patient; and said vasodilation and said warming are maintained during at least a portion of the administration of general.