The electrode array used for recording physiologic activity is referred to as:

The electrode array used for recording physiologic activity is referred to as:

• A. Polarity
• B. Montage
• C. Sensitivity
• D. Impedance

Answer: (B)

Montage describes the way the signals from the physical electrode array are arranged and referenced to create the recording channels. The electrode array is the hardware—the set and placement of electrodes on the body—while the montage defines how those signals are combined and which reference scheme is used (for example, referential or bipolar derivations, and which electrodes serve as references). This is why montage is the best term: it encompasses both the configuration and the referencing that determine what the recorded channels represent. Polarity refers to the direction of waveform deflections, sensitivity to the amplifier gain, and impedance to the electrode-tissue interface—none of these describe the overall electrode arrangement or channel derivation.

Montage describes the way the signals from the physical electrode array are arranged and referenced to create the recording channels. The electrode array is the hardware—the set and placement of electrodes on the body—while the montage defines how those signals are combined and which reference scheme is used (for example, referential or bipolar derivations, and which electrodes serve as references). This is why montage is the best term: it encompasses both the configuration and the referencing that determine what the recorded channels represent. Polarity refers to the direction of waveform deflections, sensitivity to the amplifier gain, and impedance to the electrode-tissue interface—none of these describe the overall electrode arrangement or channel derivation.