Abstract
ABSTRACT.A distinct theta rhythm in the frontal midline area during performance of mental tasks has been called “frontal midline theta” (Fm theta). This pattern shows interesting individual differences which have been investigated with the use of mental tasks such as an arithmetic addition test. Fm theta is closely related to an attention mechanism, this pattern tends to be more prominent in subjects with higher amplitude but slower frequency of theta-alpha activities in their background EEGs. Fm theta is also more marked in extroverts with insignificant traits of neuroticism and anxiety. The effect of centrally acting drugs on Fm theta was also investigated and it is suggested that relief from anxiety might be associated with the appearance of Fm theta.
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