Which montage would best display the amplitude of a left temporal spike?

The selection of a montage that best displays the amplitude of a left temporal spike is crucial for an accurate interpretation of EEG data. Using a left temporal electrode to reference the contralateral ear effectively highlights the electrical activity from the left temporal region. This arrangement allows for a clear view of any spikes originating from the left temporal lobe while minimizing confusion from activity generated by adjacent areas or the overall background rhythm. The contralateral ear serves as a neutral reference, ensuring that the specific activity from the left temporal region is more prominently featured.

This choice is particularly beneficial when assessing for conditions such as temporal lobe epilepsy, where spikes and other abnormalities are localized. By directly comparing the left temporal lobe's activity to a distant reference point, the clinician can better evaluate the amplitude and significance of the left temporal spike. In contrast, other montage options may dilute the representation of the temporal spikes by including influence from regions that may not be directly involved in the suspected pathology.