Directed Phase Lag Index

Directed Phase Lag Index Parameters :

1. Length of Analysis Segment: The whole length of the EEG data will be cut into segments and the dPLI will be calculated for each segment before getting averaged. The length in seconds need to be between 0 and the length of the EEG data.
2. Number of Permutations: The number of permutation correspond to the number of time the surrogate will be calculated. The number of permutations need to be greater than 0.
3. p Value for Surrogate Analysis: The p value will be used in the surrogate analysis to assess whether a given dPLI is significant or no.
4. Print check box: If this option is checked the pipeline will output a dPLI plot at the end of the analysis (fig. 22).
5. Save check box: If select the dPLI will be saved in the Directed Phase Lag Index directory. Also, a text file containing the input will be saved using the same name as the figure.
6. Reorder EEG data with custom order check box: If selected a pop-up window will appear where you will be able to enter the order in which you want each channel to appear (fig. 20). The default order is from channel 1 to the last channel. Make sure that there is no duplicate and that there is the same number of channels as before.

Bandpass Menu :

In the bandpass menu you can select at which frequency you want to filter your EEG data in order to do the directed phase Lag Index analysis. If you select more than one frequency pass, the analysis will be repeated for each bandpass,

• Full: Full band goes from 1Hz to 50Hz.
• Delta: Delta band goes from 1Hz to 4Hz.
• Theta: Theta band goes from 4Hz to 8Hz.
• Alpha: Alpha band goes from 8Hz to 13Hz.
• Beta: Beta band goes from 13Hz to 30Hz.
• Gamma: Gamma band goes from 30Hz to 50Hz.

Directed Phase Lag Index Examples

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