Biometric information display device, biometric information display method, and computer-readable recording medium, extracting current components at positions along a neural pathway based on current information reconstructed based on magnetic field measurement data generated by subject

A biometric information display method to be implemented in a biometric information display device that includes a display controller configured to display a morphological image indicative of the morphology of a subject, and an input controller configured to receive a designation of a specified position on the morphological image, and to receive a number of first virtual electrodes and a distance between two adjacent first virtual electrodes, the biometric information display method comprising:

• generating a neural pathway based on the specified position on the morphological image;
• generating a plurality of first virtual electrodes on the neural pathway, and a second virtual electrode and a third virtual electrode on both sides of the neural pathway at each first virtual electrode of the plurality of the first virtual electrodes, based on the number of first virtual electrodes and the distance between the two adjacent first virtual electrodes, to generate a plurality of second virtual electrodes and a plurality of third virtual electrodes;
• extracting current components at each first virtual electrode of the plurality of first virtual electrodes, each second virtual electrode of the plurality of second virtual electrodes, and at each third virtual electrode of the plurality of third virtual electrodes, based on current information reconstructed based on magnetic field measurement data generated by the subject;
• displaying current waveforms representing a time variation of the respective current components of the plurality of first virtual electrodes, the plurality of second virtual electrodes, and the plurality of third virtual electrode, on a display
• receiving a designation of a specified time range of one of the current waveforms of the plurality of first virtual electrodes, the plurality of second virtual electrodes, and the plurality of third virtual electrodes displayed on the display;
• receiving a designation of two specified current waveforms among the current waveforms of the plurality of first virtual electrodes, the plurality of second virtual electrodes, and the plurality of third virtual electrodes displayed on the display;
• and
• calculating a conduction velocity of a stimulus within the subject, based on a time variation of a feature point of the one of the current waveforms within the specified time range, and calculating the conduction velocity between two virtual electrodes corresponding to the two specified current waveforms, based on a difference between appearance times of feature points of the two specified current waveforms, and the neural pathway between the two virtual electrodes.

A non-transitory computer-readable recording medium having stored therein a display program which, when executed by a computer of a biometric information display device that includes a display controller configured to display a morphological image indicative of the morphology of a subject, and an input controller configured to receive a designation of a specified position on the morphological image, and to receive a number of first virtual electrodes and a distance between two adjacent first virtual electrodes, causes the computer to perform a process comprising:

• generating a neural pathway based on the specified position on the morphological image;
• generating a plurality of first virtual electrodes on the neural pathway, and a second virtual electrode and a third virtual electrode on both sides of the neural pathway at each first virtual electrode of the plurality of the first virtual electrodes, based on the number of first virtual electrodes and the distance between the two adjacent first virtual electrodes, to generate a plurality of second virtual electrodes and a plurality of third virtual electrodes;
• extracting current components at each first virtual electrode of the plurality of first virtual electrodes, each second virtual electrode of the plurality of second virtual electrodes, and at each third virtual electrode of the plurality of third virtual electrodes, based on current information reconstructed based on magnetic field measurement data generated by the subject;
• displaying current waveforms representing a time variation of the respective current components of the plurality of first virtual electrodes, the plurality of second virtual electrodes, and the plurality of third virtual electrode, on a display
• receiving a designation of a specified time range of one of the current waveforms of the plurality of first virtual electrodes, the plurality of second virtual electrodes, and the plurality of third virtual electrodes displayed on the display;
• receiving a designation of two specified current waveforms among the current waveforms of the plurality of first virtual electrodes, the plurality of second virtual electrodes, and the plurality of third virtual electrodes displayed on the display;
• and
• calculating a conduction velocity of a stimulus within the subject, based on a time variation of a feature point of the one of the current waveforms within the specified time range, and calculating the conduction velocity between two virtual electrodes corresponding to the two specified current waveforms, based on a difference between appearance times of feature points of the two specified current waveforms, and the neural pathway between the two virtual electrodes.