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- W3122093313 abstract "Optical sensing of physiological rhythms has been the subject of intensive research in past years. Photoplethysmography (PPG) is well established for optical reflection and/or transmission measurements of dermal blood volume changes phenomena. PPG recordings from the skin exhibit a rich spectrum including components around 1 Hz (and harmonics) due to heart pulse, breathing periodicity normally around 0.25 to 0.3 Hz, but varying over a wide range down to 0.1 Hz and less, depending on workload and wilful control, and a periodic low frequency component at around 0.12 to 0.14 Hz, which usually occurs for a number of minutes, then may disappear and possibly reoccur from time to time. The origin of this frequency component is still being debated. Its importance rests in the belief, that it is somehow related to a certain state of mind and awareness. This in turn could have therapeutic consequences if such oscillations and the corresponding mental state could be induced by outside control." @default.
- W3122093313 created "2021-02-01" @default.
- W3122093313 creator A5045685498 @default.
- W3122093313 date "2021-01-01" @default.
- W3122093313 modified "2023-10-16" @default.
- W3122093313 title "Low-Frequency Blood Volume Rhythms in the Skin Perfusion Obtained by Optical Sensing" @default.
- W3122093313 cites W2044182335 @default.
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- W3122093313 doi "https://doi.org/10.1007/978-981-15-5449-0_6" @default.
- W3122093313 hasPublicationYear "2021" @default.
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