Fig 1.
(Color on-line) Setup for EEG channels: 64 electrodes as per the international 10-20 system (excluding electrodes Nz, F9, F10, FT9, FT10, A1, A2, TP9, TP10, P9, and P10).
The specific points (full circle in red) (F332, F637, P349, P654) identify the channels used in this paper.
Table 1.
14 experimental runs for each subject: Two one-minute baseline (eyes open/closed) and three two-minute of four Tasks.
Fig 2.
(Color on-line) Original time series of the EEG signal.
Channels (a) F332 and (b) F637 represent the frontal region of the brain, and (c) P349 and (d) P654 represent the parietal region. These time series correspond to the subject S020 at the Task 1 (open and close left or right fist).
Table 2.
Information about DFA exponent.
Fig 3.
(Color on-line) FDFA in function of n for S020 experiment 1 for (Left/Right): (a) Real and (b) Imaginary case. Black line represents F332, red line F637, blue line P349, and green line P654. Also, the figures below show the difference ΔlogF32;xx, defined by Eq 2, between the channels for the above function FDFA: (c) Real and (d) Imaginary case. Here, ΔlogF32;37 (∘), ΔlogF32;49 (△), and ΔlogF32;54 (*).
Fig 4.
(Color on-line) FDFA in function of n for S020 in the experiment 1 for (Top/Down): (a) Real and (b) Imaginary case. Black line represents F332, red line F637, blue line P349, and green line P654. Also, the figures below show the difference ΔlogF32;xx, defined by Eq 2, between the channels for the above function FDFA: (c) Real and (d) Imaginary case. Here, ΔlogF32;37 (∘), ΔlogF32;49 (△), and ΔlogF32;54 (*).
Table 3.
Mean values of αDFA for all experiments (three).
First column represents the subjects, and their respective Task. The remaining columns represents the analyzed channels. Time scale represent the range for DFA analysis of αDFA(n) (slope): α1 in time scale 1, α2 in time scale 2, and α3 in time scale 3. Last line show the mean value of the columns for: Real (L/R), Imag (L/R), Real (T/D), Imag (T/D).
Fig 5.
(Color on-line) Mean values of αDFA for all subjects in all Tasks: (a) Real (L/R), (b) Imag (L/R), (c) Real (T/D), and (d) Imag (T/D) Tasks.
The symbol (□) represents time scale 1, (○) time scale 2, and (△) time scale 3.
Fig 6.
(Color on-line) Mean value of ΔlogF32;xx between the channel F332 and others three.
Every curve represent the difference between F332 and: (○) F637, (△) P349, and (*) P654.