Abstract A mental-concentration measuring method for measuring the degree of mental concentration of a subject by extracting a power spectrum with respect to a brain wave from detected brain-wave biological signals, obtaining an integrated value of the power spectrum and an integrated value of a rhythm spectrum representing mental concentration power, and measuring the mental concentration of the subject based on the ratio of these integrated values, and mental-concentration measuring apparatus as apparatus for realizing the above method comprising a brain-wave extracting device for extracting a power spectrum of a brain wave, a brain-wave spectrum integrating device for integrating the brain-wave power spectrum extracted by the brain-wave extracting device, an α-rhythm spectrum integrating device for integrating an α-rhythm spectrum representing mental concentration power, and a mental-concentration calculating device for calculating the ratio of the integrated value obtained with the α-rhythm spectrum integrating device and the integrated value obtained with the brain-wave spectrum integrating device.
A method for measuring mental concentration of the brain, the method comprising the steps of: detecting a brain wave signal from the brain; forming a power spectrum from said brain wave signal; integrating said power spectrum to determine total brain-wave power; integrating an α-rhythm portion of said power spectrum to determine an α-rhythm power; representing and indicating mental concentration by a ratio of said α-rhythm power to said total brain wave power.
Claim 2
Independent Claim
72 words
A method for measuring mental concentration of the brain, the method comprising the steps of: detecting a brain wave signal from the brain; forming a power spectrum from said brain wave signal; integrating said power spectrum to determine total brain-wave power; integrating an α-rhythm portion of said power spectrum to determine an α-rhythm power; representing and indicating mental concentration by a ratio of said α-rhythm power to said total brain wave power.
Claim 3
Dependent Claim
41 words
A method in accordance with claim 1, wherein: said total brain-wave power is determined by integrating said power spectrum from 0.5 Hertz to 30.5 Hertz; said α-rhythm power is determined by integrating said power spectrum from 7.5 Hertz to 13.5 Hertz.
Claim 4
Dependent Claim
29 words
A method in accordance with claim 1, wherein: said forming of said power spectrum is by extracting signal components from a plurality of frequency segments of said brain wave.
Claim 5
Dependent Claim
24 words
A method in accordance with claim 3, wherein: said frequency segments are substantially 1 Hertz wide and extend from 0.5 Hertz to 30.5 Hertz.
Claim 6
Independent Claim
100 words
An apparatus for measuring mental concentration of the brain, the apparatus comprising: brain wave extracting means for extracting a brain wave signal from the brain and for forming a power spectrum from said brain wave signal; integrating means for integrating said power spectrum to determine total brain-wave power and for integrating an α-rhythm portion of said power spectrum to determine an α-rhythm power; calculation means for calculating a ratio of said α-rhythm power to said total brain wave power; display means for representing and indicating mental concentration by said ratio of said α-rhythm power to said total brain wave power.
Claim 7
Independent Claim
100 words
An apparatus for measuring mental concentration of the brain, the apparatus comprising: brain wave extracting means for extracting a brain wave signal from the brain and for forming a power spectrum from said brain wave signal; integrating means for integrating said power spectrum to determine total brain-wave power and for integrating an α-rhythm portion of said power spectrum to determine an α-rhythm power; calculation means for calculating a ratio of said α-rhythm power to said total brain wave power; display means for representing and indicating mental concentration by said ratio of said α-rhythm power to said total brain wave power.
Claim 8
Dependent Claim
34 words
A device in accordance with claim 7, wherein: said brain wave extracting means also separates said brain wave signal into a plurality of segments and determines a power spectrum for each of said segments.