Spontaneous skin temperature oscillations in normal human subjects

Shusterman, Vladimir; Anderson, Kelley P.; Barnea, Ofer

doi:10.1152/ajpregu.1997.273.3.r1173

Cited by 69 publications

(52 citation statements)

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“…Spontaneous fluctuations of similar frequencies were also found for the arterial blood pressure (AKSELROD et al, 1985;MALLIANI et al, 1991) and for other parameters of the peripheral blood circulation system (BURTON, 1939;LOSSIUS et al, 1993;PORRET et al, 1995;SHUSTERMAN et al, 1997). in recent studies (NITZAN et al, 1994;1999), the spontaneous fluctuations Correspondence should be addressed to Professor Meir emaih nitzan@mail.jct.ac.il Paper received 25 April 2003 andin final form 9 October 2003 MBEC online number: 20043851 in the blood volume in the fingertip were obtained through photoplethysmography (PPG): the recording of tissue blood volume changes by the measurement of light absorption.…”

supporting

confidence: 55%

Sympathetically induced spontaneous fluctuations of the photoplethysmographic signal

Khanokh

Slovik

Landau³

et al. 2004

Med. Biol. Eng. Comput.

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The photoplethysmographic signal shows very low-frequency (VLF) spontaneous fluctuations that have been shown to be mediated by the sympathetic nervous system. In the current study, the photoplethysmographic signal was simultaneously measured in the two index fingers and the two second toes of 54 healthy male subjects. For each photoplethysmographic pulse, two parameters were derived: the pulse amplitude and its baseline, which are related to the arterial wall compliance and to the arterial blood volume, respectively. The baseline and the amplitude VLF fluctuations showed high right-left correlation both for hands (mean +/- SD 0.94 +/- 0.05 and 0.92 +/- 0.07, respectively) and for feet (0.90 +/- 0.08 and 0.89 +/- 0.07, respectively) that only slightly depended on the subject's age. Lower correlation was found between the hand and the foot (0.73 +/- 0.12 and 0.72 +/- 0.12 for the baseline and the amplitude, respectively). For each hand and foot the baseline and the amplitude VLF fluctuations were also correlated, with the baseline fluctuations lagging the amplitude fluctuations by 3-20 pulses. The amplitude-baseline correlation and the standard deviation of the amplitude or the baseline divided by its mean significantly decreased with age. The VLF fluctuations of the photoplethysmographic parameters and the correlation coefficients between them provide better understanding of the autonomic nervous regulation of the blood circulation.

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supporting

confidence: 55%

Sympathetically induced spontaneous fluctuations of the photoplethysmographic signal

Khanokh

Slovik

Landau³

et al. 2004

Med. Biol. Eng. Comput.

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“…This result was obtained by high-resolution temperature registration carried out in combination with measurement of the envelope of pulse fluctuations within the frequency range from 0.01 to 0.04 Hz. At frequencies above 0.04 Hz, the spectral energy density of temperature fluctuations was inconsiderable, and no correlation between the variations in temperature and pressure was detected (Shusterman et al 1997).…”

Section: Introductionmentioning

confidence: 94%

Wavelet-based Correlations of Skin Temperature and Blood Flow Oscillations

2008

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The wavelet transform-based correlation analysis has been used to study skin temperature fluctuations caused by periodic changes in blood flow resulting from oscillations in vasomotor smooth muscle tone. We considered two cases, one in which temperature measurements and blood flow recordings by laser Doppler flowmetry are made simultaneously and another in which two temperature signals are measured concurrently. Twelve healthy subjects participated in our study. The gapped wavelet technique was used to suppress artifacts caused by boundary effects. Simultaneous recordings of skin temperature fluctuations and the signal of the laser Doppler flowmeter provided correlation coefficients essentially exceeding the values obtained for noise signals within three spectral ranges corresponding to myogenic (0.05-0.14 Hz), neurogenic (0.02-0.05 Hz), and endothelial (0.0095-0.02 Hz) regulation mechanisms. Within the frequency range from 0.14 to 2 Hz the values of the correlation function are compatible with the values of noise correlations. The same results were obtained for two concurrently measured temperature signals. Reduction in the amplitude of temperature fluctuations and in the level of correlations with the frequency arises because the skin has the properties of a low-frequency filter. As temperature fluctuations propagate their amplitude decays as an exponential function of frequency. Hence small oscillations in the spectral range reflecting the influence of heartbeat and respiration cannot be distinguished from external thermal noise.

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“…Spontaneous fluctuations of similar frequencies were also found for other circulatory parameters (BURTON, 1939;LOSSIUS et al, 1993;NITZAN et al, 1994;PORPmT et al, 1995;SHUSTERMAN et al, 1997).…”

Section: Introductionmentioning

confidence: 54%

Right-left correlation of the sympathetically induced fluctuations of photoplethysmographic signal in diabetic and non-diabetic subjects

Buchs

Slovik

Rapoport

et al. 2005

Med. Biol. Eng. Comput.

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Photoplethysmography (PPG) records the cardiac-induced changes in tissue blood volume by light-transmission measurements. The baseline and amplitude of the PPG signal show very low-frequency (VLF) spontaneous fluctuations, which are mediated by the sympathetic nervous system, and high correlation between right and left extremities of healthy subjects. As sympathetic neuropathy is one of the diabetic complications, the right-left correlation of the PPG fluctuations was examined in diabetic patients. The PPG signal was simultaneously measured in the two index fingers and the two second toes of 35 diabetic patients and 33 non-diabetic subjects. For each PPG pulse, the baseline and amplitude were determined, and the right-left correlation coefficients of the VLF fluctuations in the baseline and amplitude were derived. The VLF fluctuations in the baseline showed high right-left correlation, both for fingers (0.93 +/- 0.05) and toes (0.93 +/- 0.06), for the non-diabetic subjects, and significantly lower correlation (0.78 +/- 0.22 and 0.84 +/- 0.17, respectively) for the diabetic patients. Similar results were obtained for the amplitude VLF fluctuations. The right-left correlation coefficients for diabetic patients decreased with the disease duration for the toe baseline and toe amplitude fluctuations and correlated with heart rate response to deep breathing for the finger baseline and toe amplitude fluctuations. The right-left correlation coefficients of the PPG fluctuations provide a simple and convenient means for assessing the adequacy of the sympathetic nervous system function.

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Spontaneous skin temperature oscillations in normal human subjects

Cited by 69 publications

References 0 publications

Sympathetically induced spontaneous fluctuations of the photoplethysmographic signal

Sympathetically induced spontaneous fluctuations of the photoplethysmographic signal

Wavelet-based Correlations of Skin Temperature and Blood Flow Oscillations

Right-left correlation of the sympathetically induced fluctuations of photoplethysmographic signal in diabetic and non-diabetic subjects

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