General Properties of Biological Rhythms

Sollberger, A.

doi:10.1111/j.1749-6632.1962.tb30597.x

Cited by 27 publications

(13 citation statements)

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“…Arousal instability is due to the combined effects of internal and/or environmental stimuli. Through continuing oscillations CAP would aim to restore a steady state that may be represented in that moment by the arousal level of single NREM sleep stages (23).…”

Section: Resultsmentioning

confidence: 99%

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The Cyclic Alternating Pattern as a Physiologic Component of Normal NREM Sleep

Terzano¹,

Mancia²,

Salati³

et al. 1985

Sleep

447

175

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Summary: The cyclic alternating pattern (CAP) is a long-lasting periodic activity consisting of two alternate electroencephalogram (EEG) patterns. This variation in EEG is closely related to fluctuations in the level of arousal that characterize two different functional states in the arousal control mechanism. We studied 20 sleep records of 10 healthy subjects to see if CAP appears under physiologic conditions. During NREM sleep, CAP corresponded to a periodic succession of spontaneous phasic phenomena recurring within every stage, i.e., intermittent alpha rhythm, K-complex sequences, and reactive slow wave sequences. The following analyses were performed. Each EEG specific alternating pattern, defined as a cycle, was subdivided into two phases depending on the arousal response to stimulation. Average cycle length, average duration of each phase, and average ratio phase/cycle were calculated. CAP rate defined as (CAP time/Sleep time) was calculated for total sleep time (TST), (CAP time/TST); for NREM sleep, (CAP time/Total NREM); and for each NREM sleep stage. CAP is the EEG translation of the reorganization of the sleeping brain challenged by the modification of environmental conditions.

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Section: Resultsmentioning

confidence: 99%

“…This synchronized response is called "phasing" (22), and it occurs when arousal is either fluctuating or in a steady state. As in any biological function, a steady state may be achieved by the application of a bipolar feedback system (9,23,24). CAP may be considered the bioelectrical translation of such a mechanism.…”

Section: Resultsmentioning

confidence: 99%

The Cyclic Alternating Pattern as a Physiologic Component of Normal NREM Sleep

Terzano¹,

Mancia²,

Salati³

et al. 1985

Sleep

447

175

View full text Add to dashboard Cite

show abstract

“…However, to track changes in amplitude, phase, period length, or shape, the biorhythm may be assumed to be a continuous function and may be described by an equation that most closely approximates the actual rhythm (Sollberger, 1962(Sollberger, , 1969. Many methods used to extract information from rhythm curves are related to Fourier analysis, which represents the algebraic sum of a series of sine (or cosine) functions of different amplitude, phase, and shape (Luce, 1970;Sollberger, 1962Sollberger, , 1969. The curve for data collected "n" times every 24 hrs can be described as an "n" term series:…”

Section: Methods Of Analysismentioning

confidence: 99%

“…+ a n-l (n-1 -, where a n = amplitude of the n term, n = term number A problem not solved by Fourier analysis -whether the curve statistically can represent the population (Sollberger, 1962) -may be avoided by adapting the work of Kirmser and Hu (1971): using the standard deviation or standard error of the calculated data to determine the variability of any physiological event. The band thus formed ( Fig.…”

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confidence: 99%

A computer method for biorhythm evaluation and analysis

Chou¹,

Besch

1974

Journal of Interdisiplinary Cycle Research

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“…Also, the starting time of flowering is kept synchronized by a Zeitgeber, which is often regulated by light (Bailly et al, 2011). Various cosmic cycles, such as sunspot periods, have been advocated as Zeitgebers, even if such correlations are more difficult to prove (Sollberger, 1962).…”

Section: Introductionmentioning

confidence: 99%

Flowering of the seagrass Posidonia oceanica in NW Mediterranean: is there a link with solar activity?

et al. 2013

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Time series analysis of the leaf biometry and rhizome production of the endemic Mediterranean seagrass Posidonia oceanica (L.) Delile was performed for a meadow in the Ligurian Sea (NW Mediterranean) in order to assess changes in plant growth during a massive flowering event that occurred in 2003 and coincided with the warmest summer temperatures recorded in the last centuries. P. oceanica exhibited the highest values of leaf surface area during the flowering year and the highest values of rhizome production in the previous year. The years immediately following the flowering event were characterized by a decrease in both parameters. Comparison of the years of massive flowering events reported in the literature for the entire Mediterranean with the historical series (spanning the last 50 years) of air temperature and sunspot number suggests that intense solar activity, and not warmer temperature per se, is likely to be the main trigger of massive Posidonia oceanica flowering events.

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General Properties of Biological Rhythms

Cited by 27 publications

References 0 publications

The Cyclic Alternating Pattern as a Physiologic Component of Normal NREM Sleep

The Cyclic Alternating Pattern as a Physiologic Component of Normal NREM Sleep

A computer method for biorhythm evaluation and analysis

Flowering of the seagrass Posidonia oceanica in NW Mediterranean: is there a link with solar activity?

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