EEG analysis

[karthik0206@gmail.com]

Dear sir, My project (phase1) is analysis of EEG signals using Spectral monitoring . Normally, the time domain signal is broken into short epochs of a 512 seconds and an FFT is performed on that data array. The data from the FFT is binned into frequency ranges according to standard EEG definitions: Delta, (0-4Hz), Theta (4-8Hz), alpha (8-12Hz) , etc. The cumulative power is reported. If it is above 50db then epilepsy s ther… can u guide me on this… Actually my major problem s how to broke shoter epochs(512 samples)…… its jus a part of ma project

[Steve.J]

If the data is already saved to disk, you can read the data back epoch by epoch (512 samples, or whatever length you want) by providing an index and length parameter to read file VI.  Do the FFT on each epoch, create "bins" by using array indexing VI's and sum the resulting sub-arrays, and loop for each epoch in the data file.

Please visit our Biomedical User Group for more information, resources, and discussion around these topics.

Steve

[karthik0206@gmail.com]

yeah data s saved n my Laptop....i didn get u sir.. i mean ur concept sir

[johnsold]

Please use complete words.  The accepted protocol on this Forum is to avoid the use of text messaging style shortcuts.

If you do not understand the concept of breaking the data set into segments, you probably need to work through the on-line tutorials for LabVIEW before trying to do more with your project.  The Array Subset function is probably what you want.

Lynn

[karthik0206@gmail.com]

Oh OK sir hereafter i will follow the protocols...am sorry. I know how to use array tools sir.. i tried it... i mean using array subset concept...i already read the tutorials sir