referential montage
EEG display configuration comparing each electrode to a common reference point for localization of abnormalities.
Full Definition
A referential montage is an EEG display method where each active electrode is compared against a common reference electrode or combination of electrodes. Common references include linked ears, average reference, or a single electrode like Cz. This montage type facilitates localization of focal abnormalities by showing the voltage distribution across the scalp relative to the reference point. Unlike bipolar montages that show voltage differences between adjacent electrodes, referential montages display absolute voltages relative to the reference. The choice of reference significantly affects waveform appearance and interpretation, making reference selection crucial for accurate analysis.
Usage
Usage note: Distinguish from bipolar montage; reference choice affects interpretation significantly.
In Context
- "The spike was better localized using a referential montage with linked ears reference." — EEG interpretation notes
- "Referential montage clearly showed the left temporal maximum of the sharp waves." — Clinical neurophysiology report