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The modified Color Density Spectral Array - an alternative method for sleep presentation

100%
Pracki T., Pracka D., Ziolkowska-Kochan M., Tafll-Klawe M., Szota A., Wilkosc M.
Acta Neurobiologiae Experimentalis
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2008
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vol. 68
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issue 4
516-518
EN
patterns is described in this article. CDSA was presented for the first time in 1987 by M. Salinsky and coauthors. This method was adapted to display frequency course and voltage of EEG signal during sleep. The overnight sleep records of 35 healthy volunteers of both sexes (23 women, 12 men; aged 1926) were analyzed in order to verify the modification of CDSA method. We propose to use combining the hypnogram and CDSA method significantly increases the informative value of data and results in enhanced quality of sleep analysis.
2
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Spectral analysis in cyclic changes of human sleep evaluation

80%
Pracka D., Pracki T.
Acta Neurobiologiae Experimentalis
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1996
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vol. 56
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issue 1
255-258
EN
In this study cyclic changes of human sleep structure were examined. For whole-night polysomnograms of 35 healthy volunteers of both sexes, manual hypnograms were created and divided into NREM-REM cycles. EEG signals from C3-A2 derivation were analysed by computer using Fast Fourier Transform (FFT). For consecutive NREM-REM cycles of individual sleep stages, EEG power density contents for delta, theta, alpha, sigma, and beta waves were analysed. For consecutive sleep cycles, a clear decrease in NREM sleep duration, especially slow wave sleep duration, was obtained. In addition, a decrease in power density of delta waves was observed. For consecutive sleep cycles, increases in REM sleep duration and in power density of theta and alpha waves were obtained. In consecutive sleep cycles, high amplitude delta slow waves are replaced by higher frequency and lower amplitude waves. Thus stages of NREM sleep are replaced by stages of REM.
3
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The presence of coherence in sympathetic and phenic activities in a developing mammal

51%
Gootman P. M., Hundley B. W., Sica A. L.
Acta Neurobiologiae Experimentalis
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1996
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vol. 56
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issue 1
137-145
EN
To determine whether are devalopment changes in the baroreceptor and central respiratory modulation of sympathetic activity, we used ordinary and partial cohernce spectral analyses on cervical and splanchnic sympathetic activity in swine 1-36 days old. Removal of barareceptor influences from cervical sympathetic and splanchnic spectra using partialization shows that 3-6 Hz peaks are due to baroreceptors since coherence decreased in more then 19 days old while remaining unchanged in less then 2 weeks old piglets. The 8-12 Hz band (present in normal coherence after 21 days) was revealed in piglets less then 14 days old after removal of respiratory modulation by partialization; similarly increrased coherence was also observed in the 16-18 Hz band through 3 weeks. Thus, use of partial power and coherency is useful tool for unmasking the complex relationships found in developing SYMP outflows. These results suggest that there is a period of reorganization within the SYMP rhythm generating circuits, which may be essential for normal development.
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