What would you typically expect to see in the frontal regions of a normal adult EEG?

In a normal adult EEG, the frontal regions typically exhibit low voltage fast activity, particularly during relaxed and awake states, which is characterized by waves in the beta frequency range. This fast activity is associated with alertness and cognitive processes. Additionally, eye movement artifacts can commonly be seen in the frontal region due to the proximity of the electrodes to the eyes. Movements like blinking or saccades can generate artifacts that overlay the brain activity, making this an expected finding in an adult EEG.

In contrast, high amplitude slow waves are more commonly associated with slower sleep stages or abnormal conditions. Theta waves are generally seen in drowsiness or light sleep rather than in a normalized awake adult EEG. Sharp spikes are characteristic of certain pathological conditions like epilepsy rather than normal brain activity. Thus, the presence of low voltage fast activity combined with eye movement artifacts accurately reflects typical findings in the frontal regions of a normal adult EEG.