| Autor: |
Podtaev, S., Dumler, A., Muravyov, N., Myasnikov, M., Tsiberkin, K. |
| Zdroj: |
Proceedings of SPIE; June 2010, Vol. 7376 Issue: 1 p73760E-73760E-6, 663847p |
| Abstrakt: |
Adaptive wavelet analysis algorithms are used to study skin temperature oscillations caused by periodic changes in the blood flow resulting from oscillations in the vasomotor smooth muscle tone. Reduction in the amplitude of temperature fluctuations with frequency arises because the skin, owing to its low thermal diffusivity, has the properties of a lowfrequency filter. In view of their small amplitude, oscillations in the spectral range, reflecting the influence of heartbeat and respiration, cannot be distinguished from the external thermal noise. To analyze changes in oscillations of skin temperature during the laser stimulation (10 mW/cm2, 630 nm) we extract three frequency bands, corresponding to myogenic, neurogenic and endothelial vascular tone regulation mechanisms. Red laser irradiation causes temperature fluctuations changes within spectral ranges corresponding endothelial functioning and neurogenic activity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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