Method for detecting lie by using cerebral blood flow analysis

Abstract

The invention discloses a method for detecting a lie by using cerebral blood flow analysis, comprising the following steps of: (a) providing a near infrared ray cerebral blood flow analyser and wearing the near infrared ray cerebral blood flow analyser on the head of a testee; (b) carrying out basic detection on the brain of the testee by using the near infrared ray cerebral blood flow analyser, and analyzing cerebral cortex active information before the testee answers a question; (c) establishing cerebral cortex active information when the testee honestly answers yes or no by using the near infrared ray cerebral blood flow analyser; (d) asking a question for detecting the lie of the testee and requiring the testee to only answer one of yes and no; (e) comparing the cerebral cortex active information when the testee answers one of yes and no for the question for detecting the lie of the testee with the cerebral cortex active information established in the step (c); and (f) judging whether the testee tells a lie or not according to the comparison result obtained in the step (e).

Description

technical field [0001] The invention relates to a lie detection method, in particular to a lie detection method utilizing cerebral blood flow analysis. Background technique [0002] Today's polygraph technology is mainly developed for measuring the physiological state of the human body such as breathing, heartbeat, blood pressure and muscle tension. Currently, the more common polygraph equipment generally includes measuring breathing devices, measuring skin electrical response devices and blood pressure measuring devices. [0003] The respiration measuring device mainly records the breathing frequency and depth, that is, records the movement of the subject's chest breathing and ups and downs. When the individual will have tension, fear, anxiety and other emotions due to lying, the sympathetic and parasympathetic nerves will be more effective in respiration. Produces tachypnea, slowed amplitude, rising or falling in a single breath cycle. [0004] The device for measuring s...

AI Technical Summary

Problems solved by technology

At present, among the instruments commonly used to detect the state of the brain, the electroencephalograph can only be used to detect the brain wave, while the high magnetic field functional magnetic resonance imaging (functionalMagnetic Resonance Imaging, fMRI) can detect the active state of the brain area, However, the instrument is too bulky and inconvenient to use

Near Infrared Spectroscopy (Near Infrared (Reflectance) Spectroscopy, NIRS) can measure the change of blood flow in the cerebral cortex by sensing the light reflected by the head, and will not be affected by electromagnetic noise, and can achieve a high degree of spatial resolution , however, there is currently no lie detection method that applies related techniques to cerebral cortex activation for altered blood flow in the brain

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