NBRC Sleep Disorders Specialty (SDS) Practice Exam

When spikelike waves are noted in the EEG and EOG channels during a polysomnography (PSG) recording, referencing the electrodes is the correct course of action. This process involves checking the electrode connections and ensuring that they are functioning properly, which helps to confirm whether the observed spikelike waves are a result of an issue with the electrodes or an actual physiological phenomenon. Proper referencing is crucial in EEG to minimize artifacts and ensure that the recorded signals accurately reflect the brain's electrical activity.

In cases where spikelike waves are present, it is essential to determine whether these are legitimate signals indicating a potential neurological issue or if they are artifacts caused by poor electrode contact or wiring issues. By referencing the electrodes, the technician can assess the quality of the signals and make adjustments if needed.

The other options might not address the immediate concern of identifying the source of the spikelike waves. For instance, replacing electrode wire may not be necessary if the issue is related to electrode placement or contact. Applying a 60Hz notch filter is typically used to eliminate power line interference and may not resolve issues related to spikelike waves. Reducing room temperature does not relate to the integrity of the EEG or EOG recordings and is unlikely to influence the observed