Which condition is likely to cause slow wave artifact in the EEG or EOG channels?

Slow wave artifacts in EEG or EOG channels are often related to physiological phenomena, and sweat can indeed be a significant contributor. When a person sweats, the increased moisture can alter the conductivity of the electrode-skin interface. This change can lead to a distortion of the electrical signals being recorded, resulting in slow wave artifacts due to the skin impedance changes.

This situation can also mask the true brain or eye activity that is being measured, leading to misinterpretations of the data. On the other hand, incorrect electrode placement, muscle tension, and sweat can all contribute to various artifacts, but sweat specifically is directly associated with the creation of slow wave-like signals. Understanding how physiological factors such as sweating can impact recordings is crucial for accurate data collection and interpretation in sleep studies.