1. A regional oximetry system comprising: a display; and at least one processor, the processor causing a plurality of views to be displayed on the display, each view configured to occupy at least a portion of the display, each of the views adapted to present data responsive to at least one physiological signal; a first sensor port configured to receive at least a first physiological signal representative of a regional tissue oxygenation level; a second sensor port configured to receive at least a second physiological signal representative of an arterial oxygen saturation level; wherein a first view presents a first trend graph of the first physiological signal and a second trend graph of the second physiological signal, and wherein the first trend graph and the second trend graph are aligned such that an area between the first trend graph and the second trend graph is representative of a differential analysis of regional-to-central oxygen saturation, wherein the processor determines a numerical representation of a currently-measured differential analysis of regional-to-central oxygen saturation, and wherein a second view presents the numerical representation of the currently-measured differential analysis of regional-to-central oxygen saturation.