373197.fig.001
Figure 1: Schematic representation of the hypothalamic-pituitary-adrenal (HPA) axis and sympathomedullary system (SMS) response to stress. CRH: corticotrophin releasing hormone; VP: vasopressin; ACTH: adrenocorticotropic hormone; ACh: acetylcholine; NE: norepinephrine; EPI: epinephrine.