Questions tagged [eeg]
The recording of voltages along the scalp for the purpose of monitoring brain wave activity and localizing sources of ionic currents
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Will demeaning affect later PSD estimates?
I'm relatively new to signal processing, so if my question reveals some conceptual misunderstanding please do say... I'm just wondering if demeaning (and thus homogenising) my data (recorded from 32 ...
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ML-Classification of Motor Imagery EEG data only at 50% in MatLab
I'm trying to do ML-classification on some Motor Imagery EEG data and for a long time now I've been stuck at ~50% being correctly classified. This is my first time working with EEG data and signal-...
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What factors could affect the scale of PSD estimation?
I was required to program a function in R to estimate power spectral density of EEG data. The function I created is, I think, rather standard, and estimates the PSD of a signal by computing
$$
\frac{2|...
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How to feed multi-channel spectrograms to Deep Neural Network?
I am using a 14 channel EEG device. To do away with the need for any handcrafted features, I wish to implement an ML classification task with the EEG data collected using deep neural networks (such as ...
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Is each label for any person for 288 trials in training session the same as 288 trials in evaluation session for BCIC-IV 2a dataset?
I have saved the label files and eeg data for each trial in .npy format. Now will it be the
case that any trial, let's say, 12th trial of person 1 in training session label and 12th trial for person 1 ...
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Is it possible to use np.fft.fft to pick out the Fourier coefficients from one timepoint, at a specific frequency?
I am trying to apply np.fft.fft on a 2D array of data of shape (98, 1024), where 98 is the number of trials and 1024 is the sampling rate in Hz. I am trying to find ...
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Use periods instead of frequencies in Comodulograms
I want to create a Comodulogram to assess PAC. I use the pactools library, which uses frequencies. Since I work with hourly data and want to look at multidien phases, it would be better to use periods ...
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EEG important values visualization
i have an array contains the EEG signal values called inputSignal, and another array contains the importance degree or the attribution value of the corresponding element in inputSignal array ,
i want ...
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Incorrect epoch labelling
I am processing an EEG signal acquired by showing 10 image of each of 40 classes. I want to label the signals converted to epochs to their corresponding class labels.
The ...
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Event-related EEG (epoch averaging) as a form of inter-harmonic bandstop filtering?
There is a matter that comes to my mind from time to time, now I describe it in detail.
Anyway I am a first year PhD student, doing research in the field of cognitive neuroscience, but yet I only have ...
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What's actually inside these EEG values?
I have opened the file in Matlab and am using MNE Python too. This is a processed EEG file in Matlab data format instead of raw EEG (Screenshot 1).
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How EEG signal is windowed? Windowing vs Epoching are they same?
I am experimenting with EEG dataset from this (title: "The Perils and Pitfalls of Block Design for EEG Classification Experiments") paper. They have applied various ML models on different ...
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Normalize the output signal that may be as similar as possible the input
I'm having a problem to normalize my output signal (extracted EEG signal) after applying Independent Component Analysis (ICA) that may be as similar as the original source (EEG signal). I need do this ...
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EEG filtration via EMG
i got little problem. I'm trying to detect HFOs in single channel EEG (the recording is multichannel, but there is not enough channels to use ICA) for my diploma thesis experiment and i want to first ...
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Bandpass filtering EEG and getting weird distortions, parameter issue?
I am trying to bandpass filter an EEG signal, nothing fancy but it's coming out pretty distorted.
EEG data is taken from forehead. Sampling rate is 250 Hz. Cutoff is 2.5 Hz & 120 Hz.
Tried in both ...
