Alterations of a rhythm's amplitude or acrophase or of a deterministic or other chaotic endpoint, such as a correlation dimension and approximate entropy, or of a standard deviation, among a multitude of other endpoints, can signal (in the otherwise neglected normal range) reversible risk elevations.
Alterations of circadian rhythms have been associated with several disease states [ 8, 12, 13].
In HAB mice the actograms generated from wheel-running behavior appeared to be fragmented as compared with those derived from NAB mice, suggesting potential alterations of ultradiem rhythms in the HAB model.
Therefore insulin-resistance was associated with alteration of circadian rhythm of parasympathetic component (at the night).
During spaceflight, astronauts experience a unique set of stressors comprised of microgravity (μG), suboptimal nutrition, social isolation, atypical work environment, solar radiation, and alteration of circadian rhythm.
A global reduction and alteration of circadian rhythm of autonomic activity are present in offspring of type 2 diabetic patients with and without insulin resistance.
We tested the hypothesis that in non insulin resistant offsprings of type 2 diabetic subjects an alteration of circadian rhythm of autonomic activity are present and that the impairment of autonomic system activity could precede the insulin resistance.
In summary, a global reduction and alteration of circadian rhythm of autonomic activity are present in offspring of type 2 diabetic patients, without and with insulin resistance (figure 2, 3).
A global reduction and alteration of circadian rhythm of autonomic activity (evaluated by HRV with 24-hours ECG Holter registration) were present in nondiabetic offspring of type 2 diabetic patients [ 32].
Therefore alterations of the circadian rhythm appear to be closely linked to the body's stress system and might have a significant impact for a number of pathologies, including MD (for reviews see [16], [49], [50]).
