Fixationsspikring

Fixationsspikring, also known as fixation spikes or fixation spikes in EEG, refers to a specific type of artifact that appears in electroencephalography (EEG) recordings. These spikes are characterized by a sudden, brief increase in voltage that occurs at the moment the subject's eyes move to a new fixation point. This phenomenon is particularly relevant in studies involving eye movements, such as those using the saccade paradigm or other tasks that require subjects to follow visual stimuli with their eyes.

The origin of fixationsspikring is thought to be related to the electrical activity generated by the eye muscles during a saccade, the rapid movement of the eyes from one point of fixation to another. This activity can be picked up by EEG electrodes placed on the scalp, resulting in the characteristic spike. The amplitude and duration of these spikes can vary depending on the amplitude and velocity of the saccade, as well as the distance between the original and new fixation points.

Fixationsspikring can pose a challenge in EEG data analysis, as these artifacts can obscure the underlying neural activity of interest. To mitigate this issue, researchers often employ various signal processing techniques, such as artifact rejection or correction methods, to remove or reduce the impact of fixationsspikring on their data. Additionally, careful experimental design and electrode placement can help minimize the occurrence of these artifacts.