Electroencephalogram analysis apparatus, electroencephalogram analysis program, and electroencephalogram analysis method

Abstract

An electroencephalogram analysis apparatus includes an electroencephalogram acquisition part and a comparison part. The electroencephalogram acquisition part is configured to acquire a first electroencephalogram measured at a first region on a head of a test subject and a second electroencephalogram measured at a second region positioned behind the first region on the head of the test subject. The comparison part is configured to compare a power of the first electroencephalogram in a specific frequency band with a power of the second encephalogram in the specific frequency band.

The invention is claimed as follows: 
     
         1 . An electroencephalogram analysis apparatus, comprising:
 an electroencephalogram acquisition part configured to acquire a first electroencephalogram measured at a first region on a head of a test subject and a second electroencephalogram measured at a second region positioned behind the first region on the head of the test subject; and   a comparison part configured to compare a power of the first electroencephalogram in a specific frequency band with a power of the second encephalogram in the specific frequency band.   
     
     
         2 . The electroencephalogram analysis apparatus according to  claim 1 , wherein
 the first region is a prefrontal region, and the second region is a frontal region.   
     
     
         3 . The electroencephalogram analysis apparatus according to  claim 2 , wherein
 the first region is an Fp region defined based on the International 10-20 system, and the second region is an F region defined based on the International 10-20 system.   
     
     
         4 . The electroencephalogram analysis apparatus according to  claim 1 , wherein
 the specific frequency band is a frequency band of sleep spindles.   
     
     
         5 . The electroencephalogram analysis apparatus according to  claim 4 , wherein
 the specific frequency band is a frequency band of slow sleep spindles.   
     
     
         6 . The electroencephalogram analysis apparatus according to  claim 5 , wherein
 the frequency band of the slow sleep spindles is greater than or equal to 10.5 Hz and less than or equal to 12.5 Hz.   
     
     
         7 . The electroencephalogram analysis apparatus according to  claim 1 , further comprising
 a stage discrimination part configured to discriminate a sleep stage of the test subject, wherein   the first electroencephalogram is an electroencephalogram of any of sleep stages 2 to 4 measured at the first region, and   the second electroencephalogram is an electroencephalogram of any of the sleep stages 2 to 4 measured at the second region.   
     
     
         8 . The electroencephalogram analysis apparatus according to  claim 1 , wherein
 the comparison part transforms the first electroencephalogram into a frequency component to generate a first electroencephalogram spectrum, transforms the second electroencephalogram into a frequency component to generate a second electroencephalogram spectrum, and compares an integral value of the first electroencephalogram spectrum in the specific frequency band with an integral value of the second electroencephalogram spectrum in the specific frequency band.   
     
     
         9 . The electroencephalogram analysis apparatus according to  claim 1 , further comprising
 a diagnosis part configured to diagnose whether the test subject is in a mood disorder state based on a comparison result of the comparison part.   
     
     
         10 . The electroencephalogram analysis apparatus according to  claim 9 , wherein
 the diagnosis part diagnoses that the test subject is in the mood disorder state when the power of the first electroencephalogram in the specific frequency band is greater than the power of the second electroencephalogram in the specific frequency band.   
     
     
         11 . An electroencephalogram analysis program that causes a computer to function as:
 an electroencephalogram acquisition part configured to acquire a first electroencephalogram measured at a first region on a head of a test subject and a second electroencephalogram measured at a second region positioned behind the first region on the head of the test subject; and   a comparison part configured to compare a power of the first electroencephalogram in a specific frequency band with a power of the second encephalogram in the specific frequency band.   
     
     
         12 . An electroencephalogram analysis method, comprising:
 acquiring a first electroencephalogram measured at a first region on a head of a test subject and a second electroencephalogram measured at a second region positioned behind the first region on the head of the test subject; and
 comparing a power of the first electroencephalogram in a specific frequency band with a power of the second encephalogram in the specific frequency band.