Physiological oscillation

Non-linear steady state bistability in Economics and Physiology Oscillations spatio-temporal oscillatory features in population Chaos and highly complex time series in Sociology and Economics Fractal growth of cities... 

Dehydroepiandrostemne (DHEA) and dehydroepiandrosterone sulfate (DHEAS) are the most abundant steroids secreted by the adrenal cortex under pituitary ACTH control (B5). Very little plasma DHEA(S) appears to be of testicular or ovarian origin. Physiologically, the concentration of DHEA(S) in the blood oscillates coincidentally with cortisol, consistent with the response of adrenal... 

Sources of Physiological Noise. Despite the apparent importance of Hb, in the literature, the change in HbO is most widely reported and sometimes is the sole response reported. HbO is sometimes preferred due to its higher sensitivity to NIR based measurements than Hb. However, HbO measurements are not without disadvantages. There have been some studies (see for example [77] [22] [23] [47]) which indicate the presence of low frequency modulation ( 0.1 Hz) of both vascular (Hb, HbO) and metabolic (cytocrhome-c-oxidase) responses to visual stimuli with unknown origin. The cause of these low frequency oscillations are... 

Oscillations of the glycolytic pathway are again considered in Section VIII. In particular, within Section VIII.C, the origin and the possible physiological relevance of oscillatory solutions are discussed. 

A prominent puzzle related to glycolytic oscillations in yeast is the question of their physiological significance. A number of diverse hypothesis have been... 

The negative feedback in glycolysis, induced by substrate inhibition of lumped PFK HK reaction, thus fulfills an important functional role but concomitantly opens the possibility of sustained oscillations. In particular, because glycolytic oscillations have no obvious physiological role and are only observed under rather specific experimental conditions, it is plausible that they are merely an unavoidable side effect of regulatory interactions that are optimized for other purposes. 

Muscle spindles are composed of nuclear bag (dynamic) and chain (static) fibres known as intrafusal fibres and these are innervated by y motor neurones. Extrafusal fibres make up the muscle bulk and are innervated by a motor neurones. Stimulation of the muscle spindle leads to increased skeletal muscle contraction, which opposes the initial stretch and maintains the length of the fibre. This feedback loop oscillates at 10 Hz, which is the frequency of a physiological tremor. 

Circadian clock-controlled rhythms provide most organisms with an orchestrated temporal programme that allows for appropriate timing of physiology (i.e. blood pressure, hormonal levels) and behaviour (i.e. alertness, sleep-wake cycle). The mammalian central circadian pacemaker resides in the suprachiasmatic nucleus (SCN) of the brain (Weaver 1998). At the molecular level, the core oscillator driving the mammahan clock consists of interconnected autoregulatory... 

Menaker I think that the anticipation of the wheel is the same kind of thing physiologically as the anticipation of the food. And it is all motivational stuff this is why I think it is also probably related to the methamphetamine-induced oscillation. Keeping things as simple as possible, then there is only one other extra SCN oscillator controlling behaviour. 

Studies of mammals subjected to SCN destruction and transplantation have revealed that the hypothalamic SCN contains a master circadian oscillator which is involved in a number of behaviours and hormonal secretions. The circadian oscillatory activity of SCN neurons is directly demonstrated by the measurement of [ " C] glucose metabolic activity and field potentials assessed by electro-physiological devices. The clock oscillatory genes mPer1 and mPer2 are expressed rhythmically in most neurons in the SCN. Thus, thousands of clock cells in the SCN might generate the rhythm. 

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