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Table 2 Different levels of coefficients and their corresponding brain waves

From: Prediction of gait intention from pre-movement EEG signals: a feasibility study

CoefficientsFrequency Range (approx.)Sub-band
First level detail coefficient (cD1)62.5-125-
Second level detail coefficient (cD2)31.25-62.5Gamma
Third level detail coefficient (cD3)15.63-31.25Beta
Fourth level detail coefficient (cD4)7.81-15.63Alpha
Fourth level approximate coefficients (cA4)0-7.81Delta and theta