Methods and device for determining a valid intrinsic frequency
AssigneeNeosync, Inc.
InventorsJames William Phillips, Yi Jin
Life of this patent
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Abstract
Described are methods and a device for determining a valid intrinsic alpha frequency. Described herein are methods and a device for determining the appropriate intrinsic alpha frequency (IAF) to be applied for neuro-EEG synchronization therapy using alternating magnetic fields to gently “tune” the brain and affect the mood, focus and cognition of subjects. Methods and a device described herein use an algorithm to quantitatively analyze EEG recordings to determine if recorded EEG frequencies are valid, and if necessary, requiring additional recordings and analysis until a valid EEG is found. Methods and devices described herein can be utilized to calculate the intrinsic frequency of other EEG bands, including the Theta, Beta Gamma and Delta bands.
Claims20
A method of determining a final intrinsic alpha frequency (fIAF) of a subject in a neuro-electroencephalogram (EEG) synchronization therapy comprising:
- applying an EEG discrimination routine executed by one or more processors and comprising:
- a) receiving a first EEG recording obtained from an EEG sensor in a time domain;
- b) segmenting the first EEG recording into a plurality of epochs, each of the plurality of epochs comprising a segment of data, wherein a total number of epochs is N;
- c) filtering the segment of data of each epoch using a high-pass filter;
- d) converting each epoch into a frequency domain epoch (i);
- e) filtering each frequency domain epoch (i) using a smoothing filter;
- f) calculating an epoch intrinsic alpha frequency (mi) of each frequency domain epoch (i);
- g) calculating a mean (M) intrinsic alpha frequency (IAF) of all intrinsic alpha frequencies (mi-N), wherein
- M
- =
- 1
- N
-
- ∑
- i
- =
- 1
- N
-
- m
- i
- ;
- h) determining a farthest frequency domain epoch (mi) from the M,
- if |mI−M|>0.5 hertz(Hz), removing the farthest frequency domain epoch (mI), decrementing N, and returning to step g), or
- if |mI−M|≤0.5 Hz, continuing to next step;
- i) setting fIAF equal to M;
- and
- j) outputting the fIAF to a therapy device that delivers a low amplitude stimulation;
- and
- delivering, with the therapy device, low amplitude stimulation at the fIAF.
Dependencies are inferred from the claim text.