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Relationship between frontal midline theta activity in EEG and concentration.

The relationship between the appearance of EEG theta rhythm in the frontal midline area (Fm theta) and the level of concentration was investigated by using warning signals in simple reaction tasks on 6 male subjects. The result that Fm theta appeared in the foreperiods between the warning and the signal to respond suggests a relation between Fm theta and concentration. Fm theta also appeared, however, at other times. This suggests that a component of Fm theta may not be related to concentration.