Spatio-temporal analysis of Frontal midline theta rhythm during maze task with EEG

Abstract

Aim of this study is to examine the relationship between spatial recognition and frontal midline theta rhythm.EEG measurement was carried out with the International electrode system in the shielded room. It was used to 86dB of voltage amplification and analog BPF. Maze tasks were memory and trial tasks. The difficulties of maze task were adjusted by the number of turning points having T-junction and crossroads. 7 healthy subjects were participated with informed consent.In order to get the theta-band, digital BPF was used and EOG artifact was removed by Independent-Component-Analysis. Time-frequency analysis and singular-value-decomposition were used to identified the appearance interval of 6Hz. Finally, to examine the relationship between each electrode on surface of the head was used with coherence analysis.It was shown that the strong relation between Fz and electrode area surrounded it, and there was the weak relation between Fz and post area of the head.