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Objective To evaluate the accuracy of applying functional near-infrared spectroscopy (fNIRS) for measurement of short-term heart rate variability (HRV). Methods Sixteen college students were recruited from Wuhan University and surrounding universities as the volunteer subjects from October 2020 to September 2021. The short-term HRV of subjects in resting state was simultaneously measured with electrocardiogram (ECG) and fNIRS. The consistency of the results measured with fNIRS on the forehead and at the finger was evaluated; and the accuracy of fNIRS measurements was assessed using the result of ECG measurement as the golden standard. Results No statistically significant differences existed between the fNIRS measurements on the forehead and at the finger in these short-term HRV parameters including sympathetic nervous system index(SNS index), parasympathetic nervous system index (PNS index), pressure index, Mean RR, standard deviation of normal-to-normal RR intervals (SDNN), triangular interpolation of normal-to-normal intervals (TINN), approximate entropy (ApEn) and sample entropy (SampEn). Excepting for the entropy parameters (ApEn: P<0.05 and SampEn: P<0.01) that are for measuring the complexity of time series, no statistically significant differences were observed in most short-term HRV parameters (PNS index, SNS index, pressure index, Mean RR, SDNN and TINN) between the fNIRS measurements and the ECG golden standard. Conclusion With satisfactory accuracy, it is feasible to use fNIRS in measuring short-term HRV.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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