Influence of α-Oscillation Phase-dependent Exogenous Afferent Input on the Powers of Background EEG Rhythms

Three patients with unilateral auditory disturbances (singing voices, rockets and gongs, and whistling kettles) are described. The symptoms occurred during benzodiazepine withdrawal in two patients and the instigation of nefopam treatment in one. All patients had mild hearing loss and abnormal auditory evoked potentials. Two showed marked asymmetry of background EEG rhythms over the temporal lobe. In two of the patients the symptoms responded partially to TENS and/or acupuncture.

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Effect of bedside light on sleep quality and background eeg rhythms

Sleep Medicine ◽

10.1016/j.sleep.2013.11.397 ◽

2013 ◽

Vol 14 ◽

pp. e170

Author(s):

J. Kim ◽

K. Hwang ◽

J. Cho ◽

D. Koo ◽

E. Joo ◽

...

Keyword(s):

Sleep Quality ◽

Eeg Rhythms ◽

Background Eeg

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Manganese encephalopathy and interhemispheric asymmetry of the brain

Bulletin of Taras Shevchenko National University of Kyiv Series Biology ◽

10.17721/1728_2748.2021.84.8-13 ◽

2021 ◽

Vol 84 (1) ◽

pp. 8-13

Author(s):

L. Berezovchuk ◽

M. Makarchuk

Keyword(s):

Recording System ◽

Cortical Activation ◽

Total Power ◽

Bioelectrical Activity ◽

Interhemispheric Asymmetry ◽

Eeg Rhythms ◽

Activation Coefficient ◽

Bioelectric Signals ◽

Background Eeg ◽

The Brain

Patients suffering from manganese encephalopathy, which develops while taking surrogate drugs, suffer from pronounced subcortical pseudobulbar syndrome, pyramidal insufficiency and a complex of autonomic disorders. The most pronounced of them are disorders of motor functions. The work is devoted to the study of the bioelectrical activity of the brain of patients with manganese encephalopathy in order to develop an EEG-criterion for diagnosing this disease. The subjects underwent EEG recording using a 16-channel electroencephalograph "NeuroCom standart" (KhAI-Medika, Ukraine) in accordance with the international recording system "10-20". The following were analyzed: the power of the signals of the main rhythms of the background EEG, the relative characteristics of the power of the signals of the main EEG rhythms – the activation coefficient of the cortex, the activation coefficient of the sub cortex, the indices of interhemispheric asymmetries in terms of the power of bioelectric signals in bilaterally synchronous points of the head. It was found that in patients with manganese encephalopathy both the cortical activation coefficients and the sub cortex activation coefficients had values that can be observed in patients with аnother diseases. In turn, such indicators as interhemispheric asymmetry in the power of signals of individual rhythms and interhemispheric asymmetry in the total power of signals at bilaterally synchronous points of the head in patients with manganese encephalopathy had values that significantly differed from those in patients with other types of pathology. So, with indicators of 16-18 interhemispheric asymmetries in healthy people and 9-25 in patients in coma, in patients with manganese encephalopathy, it was observed: in one patient – 12 interhemispheric asymmetries, in the other of the patients – 9, 7, 3 and 2 interhemispheric asymmetries in signal power of individual rhythms at bilaterally synchronous points of the head. The reason for such a pronounced smoothing of interhemispheric asymmetries in patients with manganese encephalopathy, obviously, may be those destructive changes in the subcortical parts of the GM that are present in this group of patients.

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The limits of human performance

Essays in Biochemistry ◽

10.1042/bse0440011 ◽

2008 ◽

Vol 44 ◽

pp. 11-26 ◽

Cited By ~ 14

Author(s):

Ralph Beneke ◽

Dieter Böning

Keyword(s):

Human Performance ◽

Safety Margin ◽

Afferent Input ◽

Metabolic Energy ◽

Human Organism ◽

Mechanical Resistance ◽

As Doping ◽

Gene And Protein Expression ◽

Underlying Mechanisms ◽

Biochemical Research

Human performance, defined by mechanical resistance and distance per time, includes human, task and environmental factors, all interrelated. It requires metabolic energy provided by anaerobic and aerobic metabolic energy sources. These sources have specific limitations in the capacity and rate to provide re-phosphorylation energy, which determines individual ratios of aerobic and anaerobic metabolic power and their sustainability. In healthy athletes, limits to provide and utilize metabolic energy are multifactorial, carefully matched and include a safety margin imposed in order to protect the integrity of the human organism under maximal effort. Perception of afferent input associated with effort leads to conscious or unconscious decisions to modulate or terminate performance; however, the underlying mechanisms of cerebral control are not fully understood. The idea to move borders of performance with the help of biochemicals is two millennia old. Biochemical findings resulted in highly effective substances widely used to increase performance in daily life, during preparation for sport events and during competition, but many of them must be considered as doping and therefore illegal. Supplements and food have ergogenic potential; however, numerous concepts are controversially discussed with respect to legality and particularly evidence in terms of usefulness and risks. The effect of evidence-based nutritional strategies on adaptations in terms of gene and protein expression that occur in skeletal muscle during and after exercise training sessions is widely unknown. Biochemical research is essential for better understanding of the basic mechanisms causing fatigue and the regulation of the dynamic adaptation to physical and mental training.

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EEG Rhythms and Neurodynamics Under Cell Phone Radiation

PsycEXTRA Dataset ◽

10.1037/e401622008-001 ◽

2005 ◽

Author(s):

Tullio A. Minelli ◽

Maurizio Balduzzo ◽

Madeleine Clifford ◽

Francesco Ferro Milone ◽

Valentina Nofrate

Keyword(s):

Cell Phone ◽

Eeg Rhythms ◽

Cell Phone Radiation

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An Adaptive and Learning System for Feedback-Controlled Evoked Response Studies

Methods of Information in Medicine ◽

10.1055/s-0038-1635302 ◽

1981 ◽

Vol 20 (03) ◽

pp. 169-173

Author(s):

J. Wagner ◽

G. Pfurtscheixer

Keyword(s):

Brain Activity ◽

Evoked Response ◽

Learning System ◽

Time Interval ◽

Electrical Brain Activity ◽

Long Time ◽

The Subject ◽

Eeg Power ◽

Stimulation System ◽

Background Eeg

The shape, latency and amplitude of changes in electrical brain activity related to a stimulus (Evoked Potential) depend both on the stimulus parameters and on the background EEG at the time of stimulation. An adaptive, learnable stimulation system is introduced, whereby the subject is stimulated (e.g. with light), whenever the EEG power is subthreshold and minimal. Additionally, the system is conceived in such a way that a certain number of stimuli could be given within a particular time interval. Related to this time criterion, the threshold specific for each subject is calculated at the beginning of the experiment (preprocessing) and adapted to the EEG power during the processing mode because of long-time fluctuations and trends in the EEG. The process of adaptation is directed by a table which contains the necessary correction numbers for the threshold. Experiences of the stimulation system are reflected in an automatic correction of this table. Because the corrected and improved table is stored after each experiment and is used as the starting table for the next experiment, the system >learns<. The system introduced here can be used both for evoked response studies and for alpha-feedback experiments.

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