Psychological state assessment device, psychological state assessment method
First Claim
1. A psychological state assessment device which has a subject perform an assignment that comprises multiple tasks and that sets up a rest, a time during which a task is not given, between a specified task and the following task, and which assesses the psychological state when performing the assignment, comprising:
- a measurement unit that detects specified parameter signals having a correlation to the amount of blood and/or the amount of blood components in a specified measurement site in the brain of the aforementioned subject, and measures the intensity of the parameter signals;
a calculator that calculates the amount of blood and/or amount of blood components based on the parameter signal intensities that the measurement unit measures;
a time change data generator that generates time change data indicating the time changes for the amount of blood and/or the amount of blood components when performing a task and when resting respectively by acquiring sequentially over time the amount of blood and/or the amount of blood components that the calculator calculates; and
an output unit that outputs such that a distinction can be made between time change data while performing a task and time change data while at rest, both of which are generated by the time sequence data generator, and also outputs such that the time change data during a specified rest can be compared with time change data while performing the immediately prior and immediately following tasks; and
configured such that the psychological state of the subject when performing the assignment is assessed based on the aforementioned time change data while at rest.
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Abstract
In order to offer a new and useful device in being able to objectively assess the psychological state when a subject performs an assignment, a psychological state assessment device is configured to irradiate a specified measurement site in the brain of a subject with near infrared light of a specified wavelength, to obtain time change data indicating time change data for the amount of blood and/or amount of blood components respectively while performing a task and while at rest, and to assess the psychological state of the subject while performing the assignment based on time change data during the rest period in comparison with time change data while performing the task.
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Citations
11 Claims
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1. A psychological state assessment device which has a subject perform an assignment that comprises multiple tasks and that sets up a rest, a time during which a task is not given, between a specified task and the following task, and which assesses the psychological state when performing the assignment,
comprising: -
a measurement unit that detects specified parameter signals having a correlation to the amount of blood and/or the amount of blood components in a specified measurement site in the brain of the aforementioned subject, and measures the intensity of the parameter signals;
a calculator that calculates the amount of blood and/or amount of blood components based on the parameter signal intensities that the measurement unit measures;
a time change data generator that generates time change data indicating the time changes for the amount of blood and/or the amount of blood components when performing a task and when resting respectively by acquiring sequentially over time the amount of blood and/or the amount of blood components that the calculator calculates; and
an output unit that outputs such that a distinction can be made between time change data while performing a task and time change data while at rest, both of which are generated by the time sequence data generator, and also outputs such that the time change data during a specified rest can be compared with time change data while performing the immediately prior and immediately following tasks; and
configured such that the psychological state of the subject when performing the assignment is assessed based on the aforementioned time change data while at rest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A psychological state assessment method that has a subject perform an assignment that comprises multiple tasks and that sets up a rest, a time during which a task is not given, between a specified task and the following task, and assesses the psychological state while performing the assignment wherein
time change data when resting is extracted by measuring the intensity of specified parameter signals having a correlation to the amount of blood and/or the amount of blood components of a specified measurement site of the brain of the aforementioned subject, by calculating the amount of blood and/or the amount of blood components based on the parameter signal intensity, and by generating time change data indicating the time changes in the amount of blood and/or the amount of blood components while performing a task and while at rest respectively; - and
the psychological state of the subject when performing the assignment is assessed based on the time change data when resting.
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11. A method of measuring brain activity during predetermined assigned tasks to be performed by a subject, comprising:
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applying electromagnetic radiation and a magnetic field to provide a composite image of a brain;
selecting a measurement site appropriate to measure oxyHb and deoxyHb from the composite image;
applying sensors to the measurement site of the subject to enable measurement of the amount of oxyHb and deoxyHb;
having the subject perform a test cycle of predetermined assigned tasks with a predetermined rest period provided between the tasks;
measure the oxyHb and deoxyHb during the assigned tasks and the rest period of the test cycle;
calculate changes in the oxyHb and deoxyHb during the test cycle;
calculating a baseline correction value from the changes in oxyHb and deoxyHb based on the relative changes in value from the rest period and the assigned tasks; and
apply the baseline correction value to the measured oxyHb and deoxyHb to determine a psychological state of the subject.
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Specification