The invention relates to a physiological index detection
system for evaluating psychological
neural activity. The physiological index detection
system comprises a photoelectric combination probe, an excitation source device, a low-frequency oscillator, a
skin blood flow detection device, a
skin potential electrical property detection device, a
digital signal processor and a display terminal, wherein the photoelectric combination probe is used for acquiring physiological signals of
peripheral sympathetic nervous activity of a
human body; the
skin blood flow detection device is used for measuring the velocity and the flow of
skin blood flow and obtaining physiological indexes of microcirculations controlled by
epinephrine sympathetic nerves; the skin
potential electrical property detection device is used for measuring the electrical property of the
evoked potential of the skin and obtaining the physiological indexes of the
sweat gland controlled by
acetylcholine sympathetic nerves. The physiological index detection
system has the advantages that a
human body palm / sole skin
evoked potential electrical property and
skin blood flow testing method is ingeniously used for detecting the physiological indexes related to the activity and the reaction of the
peripheral sympathetic nerves, and scientific and accurate biomarker data are provided for the evaluation and diagnosis on the
mental activity of
human body nerves.