Methods for monitoring affective brain function
First Claim
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1. A method for assessing a sensory response of a subject to visual stimulus, comprising the steps of:
- a) monitoring pupillary response of the subject during exposure to visual stimulus using a suitably adapted apparatus; and
b) translating the pupillary response into data representative of abrupt changes in pupil diameter, wherein abrupt changes are defined by a change in pupil size by 5% or more in less than 20 milliseconds.
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Abstract
An evaluation of affective brain function and, more particularly, to the monitoring of such function as an indication of the reception of visual stimulus. Such evaluation primarily involves analyzing dilation responses as a measure of whether the visual stimulus evokes a positive or negative affective response.
40 Citations
12 Claims
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1. A method for assessing a sensory response of a subject to visual stimulus, comprising the steps of:
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a) monitoring pupillary response of the subject during exposure to visual stimulus using a suitably adapted apparatus; and
b) translating the pupillary response into data representative of abrupt changes in pupil diameter, wherein abrupt changes are defined by a change in pupil size by 5% or more in less than 20 milliseconds. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for assessing sensory response of a subject to visual stimulus over a period of time being divisible by a number of equal time increments, comprising the steps of:
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a) monitoring left and right pupillary response of the subject during exposure to visual stimulus using a suitably adapted apparatus, wherein said pupillary response includes a plurality of dilation reflexes;
b) translating the pupillary response into data representative of the dilation reflexes; and
c) converting the data into a measure of the sensory response over time by calculating an average dilation index during each of said time increments, wherein said dilation index comprises a measure of the dilation reflexes each of the time increments. - View Dependent Claims (8, 9, 10, 11)
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12. A method for categorizing a visual stimulus as attractive or aversive, comprising the steps of:
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a) monitoring left eye pupillary responses of a subject during exposure to the visual stimulus over a given time period using a suitably adapted apparatus; and
b) translating the pupillary response into data representative of abrupt changes in pupil diameter;
wherein the visual stimulus is categorized as attractive if the left eye demonstrates an average number of abrupt changes per second that is equal to or between one and two, and aversive if the left eye demonstrates an average number of abrupt changes per second that is less than one or more than two.
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Specification