A monitor that includes multiple detection channels having multiple input ports for receiving a group of electrical physiological signals from a person wherein multiple switching circuits of the monitor are configured according to a first configuration when the monitor operates in a first mode, thereby causing each electrical physiological signal of the group to be processed by up to a single selected detection channel of the multiple detection channels wherein the multiple switching circuits of the monitor are configured according to a second configuration when the monitor operates in a second mode thereby causing one or more of the multiple electrical physiological signals of the group to be processed by at least two selected detection channels of the multiple detection channels.
