Automated detection of sleep and waking states
First Claim
1. A method, comprising:
- obtaining data indicative of brainwave activity;
normalizing at least one frequency range of said data to change a power level of the data in said at least one frequency range relative to data in another frequency range, to form normalized data indicative of brainwave activity;
a second normalizing of the data, to form double normalized data, wherein said second normalizing comprises normalizing frequencies across time; and
analyzing said double normalized data indicative of brainwave activity utilizing a computing device to provide at least one parameter indicative of sleep state from said analyzing.
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Accused Products
Abstract
Determining low power frequency range information from spectral data. Raw signal data can be adjusted to increase dynamic range for power within low power frequency ranges as compared to higher-power frequency ranges to determine adjusted source data valuable for acquiring low power frequency range information. Low power frequency range information can be used in the analysis of a variety of raw signal data. For example, low power frequency range information within electroencephalography data for a subject from a period of sleep can be used to determine sleep states. Similarly, automated full-frequency spectral electroencephalography signal analysis can be useful for customized analysis including assessing sleep quality, detecting pathological conditions, and determining the effect of medication on sleep states.
34 Citations
29 Claims
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1. A method, comprising:
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obtaining data indicative of brainwave activity; normalizing at least one frequency range of said data to change a power level of the data in said at least one frequency range relative to data in another frequency range, to form normalized data indicative of brainwave activity; a second normalizing of the data, to form double normalized data, wherein said second normalizing comprises normalizing frequencies across time; and analyzing said double normalized data indicative of brainwave activity utilizing a computing device to provide at least one parameter indicative of sleep state from said analyzing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining sleep states in a subject over a period of time comprising:
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receiving brain wave data for the subject over the period of time, wherein the brain wave data exhibits lower dynamic range for power in at least one low power first frequency range in a frequency spectrum as compared to a second frequency range in the frequency spectrum; segmenting the brain wave data into one or more epochs; weighting frequency power of the one or more epochs across time utilizing a computing device, wherein the weighting comprises increasing the dynamic range for power within the low power frequency range of the frequency spectrum as compared to the second frequency range, thereby generating one or more frequency weighted epochs; and providing classified sleep states of the subject based on the one or more frequency weighted epochs. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification