Method and apparatus for assessing neural activation
First Claim
1. A method for assessing neural activation of a brain, comprising:
- sensing one or more bioelectrical signals from one or more electrodes in contact with or proximate the brain;
measuring the amplitude of the one or more bioelectrical signals over a period of time;
calculating a plurality of variance values from the amplitude of the one or more bioelectrical signals, each of the variance values of the plurality corresponding to the variance of the amplitude for a different interval of time of the period of time with respect to the other variance values of the plurality of variance values; and
assessing the relative level of neural activation of an area of the brain based on the plurality of variance values, wherein the area of the brain is assessed to have a higher level of neural activation when the variance is higher as compared to the level of neural activation when the variance is lower and wherein sensing, measuring, calculating, and assessing are each performed at least in part by control circuitry;
wherein assessing the relative level of neural activation of the area of the brain comprises estimating the functional synaptic volume of the area of the brain.
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Abstract
Various embodiments concern sensing a LFP signal from one or more electrodes, measuring the amplitude of the signals over a period of time, and calculating a plurality of variance values from the amplitude, wherein each of the variance values correspond to the variance of the amplitude for a different interval of time of the period of time with respect to the other variance values. Such embodiments may further include assessing the relative level of neural activation of an area of the brain based on the variance values, wherein the area of the brain is assessed to have a relatively higher level of neural activation when the variance is relatively higher and the area of the brain is assessed to have a relatively lower level of neural activation when the variance is relatively lower.
124 Citations
19 Claims
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1. A method for assessing neural activation of a brain, comprising:
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sensing one or more bioelectrical signals from one or more electrodes in contact with or proximate the brain; measuring the amplitude of the one or more bioelectrical signals over a period of time; calculating a plurality of variance values from the amplitude of the one or more bioelectrical signals, each of the variance values of the plurality corresponding to the variance of the amplitude for a different interval of time of the period of time with respect to the other variance values of the plurality of variance values; and assessing the relative level of neural activation of an area of the brain based on the plurality of variance values, wherein the area of the brain is assessed to have a higher level of neural activation when the variance is higher as compared to the level of neural activation when the variance is lower and wherein sensing, measuring, calculating, and assessing are each performed at least in part by control circuitry; wherein assessing the relative level of neural activation of the area of the brain comprises estimating the functional synaptic volume of the area of the brain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a lead; one or more electrodes that are on the lead and are configured to sense bioelectrical activity of a brain; and control circuitry configured to; sense one or more bioelectrical signals using the one or more electrodes; measure the amplitude of the one or more bioelectrical signals over a period of time; calculate a plurality of variance values from the amplitude of the one or more bioelectrical signals, each of the variance values of the plurality corresponding to the variance of the amplitude for a different interval of time of the period of time with respect to the other variance values of the plurality of variance values; and assess the relative level of neural activation of an area of the brain based on the plurality of variance values, wherein the area of the brain is assessed to have a higher level of neural activation when the variance is higher as compared to the level of neural activation when the variance is lower; wherein the control circuitry is further configured to assess the relative level of neural activation of the area of the brain by estimating the functional synaptic volume of the area of the brain. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for assessing activation of a brain, comprising:
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means for sensing one or more bioelectrical signals from a brain; means for measuring the amplitude of the one or more bioelectrical signals over a period of time; means for calculating a plurality of variance values from the amplitude of the one or more bioelectrical signals, each of the variance values of the plurality corresponding to the variance of the amplitude for a different interval of time of the period of time with respect to the other variance values of the plurality of variance values; and means for assessing the relative level of neural activation of an area of the brain based on the plurality of variance values, wherein the area of the brain is assessed to have a higher level of neural activation when the variance is higher as compared to the level of neural activation when the variance is lower; and wherein the means for assessing comprises means for assessing the relative level of neural activation of the area of the brain by estimating the functional synaptic volume of the area of the brain.
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Specification