What do electrodes placed on the dorsum of the hand primarily monitor?

Electrodes placed on the dorsum of the hand primarily monitor artifact induced from surroundings. When conducting an EEG or any electrophysiological monitoring, it is crucial to account for any external electrical noise that could interfere with the readings. The dorsum of the hand is a location where artifacts from various environmental sources, such as electrical devices or movements, can be picked up. These artifacts can manifest as unwanted signals on the EEG and may obscure the actual brain activity being studied.

The assessment of artifacts is essential for ensuring the accuracy and clarity of recordings. By monitoring electrode placement on the hand, practitioners can identify and differentiate between genuine neurophysiological signals and those caused by external interference. This awareness allows for improved data interpretation and a more accurate understanding of the brain's electrical activity.