DTF
Determination of EEG propagation in brain
Beta activity
after finger movement
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EEG activity propagation
after finger movement
 The picture below shows a matrix
of EEG propagation
between data channels during repeated finger movement experiment [4]. In each small box the intensity of
propagation measured by SDTF
is reflected in the color
scale (minimum=blue, maximum=red). On horizontal scale of each graph -
time in seconds (movement at t=0), on vertical
sacle - frequency in Hz. The propagation in each cell is from the
electrode shown above the
column to the electrode marked
on the left of the row. Graphs on the main diagonal show power
autospectra. Note the gap in the propagation
around time zero, especially for outflows from electrode C3 (4th column
in the picture), and increase in beta
band
after movement (for instance C3->Fc3).
 To make the transmissions in beta
band better visible, the SDTFs were integrated in the beta frequency
range. The time courses of selected transmissions are now shown as
typical graphs. The increase of transmission is observed around 1 sec
after the movement.
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