What component of an EEG is affected by eye movements?

The component of an EEG that is influenced by eye movements is known as electrooculographic artifact. This type of artifact arises from the electrical potential generated by the eye, specifically its position and movement. When the eyes move, the electrical signals associated with them can create noticeable distortions in the EEG trace. This is particularly significant because these movements can cause false readings that may be mistaken for brain activity, impacting the accuracy of the EEG analysis.

Understanding this phenomenon is crucial for interpreting EEG recordings accurately. It emphasizes the need for clinicians to be aware of potential artifacts in their recordings, and it often leads to the implementation of techniques to minimize their impact, such as instructing patients to limit eye movements during the recording process. This awareness helps to maintain the integrity of the EEG and allows for more reliable data analysis.