[Eeglablist] Low Phase Locking Values

[Kim,Hannah]

Dear EEGLAB community,

I am trying to compute the phase locking value however, I am getting values lower than 0.1 from every data(18 animals, channels from both pre and post). Would you please look at the steps and tell me if I am doing something wrong?

So, these are my steps:
First, I import the mat file and change Sampling rate to 2000Hz. Then I set the channel locations. Then since I want to analyze the first 1 hour, from the select the data, I set the Time Range to be ‘0 3600’ and remove channels that are bad. Then I apply the notch filter using Tools > Filter the data > Basic FIR filter and set the lower edge to 59 and higher edge to 61 and click Notch filter the data instead of pass band. (I tried to use CleanLine but I am getting this error “Undefined function ‘finv’ for input arguments of type ‘double’”) After applying notch filter, I process ICA using Reject data using Clean Rawdata and ASR and deselect Process/Remove channels since I don’t want channel itself to be removed. These are the preprocess I do, and with the plugin PAC Tools, I am computing the Phase Locking Value. So with the Estimate PAC, I first choose all channels for both Phase data and Amplitude data. Then for the Freq range for Phase data, I set it as ‘4 8’ and for Amplitude data, I set it as ’30 100’.  Then I set # Frequencies to 1 for both with no log-scale. After these, I set the PAC method to compute as Phase Locking Value to compute the value.

Thank you so much!

Sincerely,
Hannah Kim