Hyperventilation Test-Related Changes of EEG in Children: Peculiarities Detected Using Periodometric Analysis

Poddubnaya, E. P.

doi:10.1023/b:neph.0000042566.38925.9d

Cited by 2 publications

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“…Earlier, we described results of studies of the informative value of periodometric indices characterizing the temporal structure of EEG in clinically healthy schoolchildren [19]. We proposed a classification of the EEG patterns reflecting the age-related regularities of the formation of cortico-subcortical relations in the course of ontogenesis, and demonstrated the applicability of periodometric indices for the characterization of dynamic modifications of the cerebral electrical activity resulting from changes in the physiological state (in particular in a hyperventilation test) [22]. Considering the periodometric characteristics in healthy children of mid-school age, we classified five main patterns of the current EEG: slow-wave, hypersynchronous, close to an "adult" type (an "optimum norm"), polyrhythmic, and high-frequency patterns [19].…”

Section: Resultsmentioning

confidence: 99%

Complex estimation of adaptation abilities of the organism in children using the indices of responsiveness of the cardiovascular system and characteristics of EEG

Poddubnaya

2006

Neurophysiology

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Based on the complex analysis of the data of cardiointervalographic (CIG) and rheoencephalographic (REG) examination of 37 healthy children and 63 children suffering from bronchial asthma (BA), we identified the most informative indices characterizing reactions of the cardiovascular system under conditions of an active orthostatic test (coefficient of autonomic responsiveness and index of responsiveness of the vessels). We conclude that the relation between the values of these indices allows one to identify the level of strain of the regulatory mechanisms and the state of the adaptation systems of the organism, which determine the adequacy of control of the autonomic sphere. The following gradations can be classified: an optimum level, compensated adaptation disorders (strain and overstrain of the regulatory mechanisms), and decompensated adaptation disorders (exhaustion of the regulatory mechanisms and failure of adaptation). Among clinically healthy children, we found a risk group (about 30%) with manifestations of lowering of the organism's adaptive abilities. It is shown that groups of healthy children and children suffering from BA differ from each other in the shares of different patterns of EEG and variants of EEG responses to a hyperventilation test. Qualitative and quantitative characteristics of EEG in children, despite high interindividual variability, clearly correlate with the state of adaptation processes. The expedience of a complex approach in estimating the adaptation ability of the child based on the data of CIG, REG and EEG examinations is discussed.

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Section: Resultsmentioning

confidence: 99%

Complex estimation of adaptation abilities of the organism in children using the indices of responsiveness of the cardiovascular system and characteristics of EEG

Poddubnaya

2006

Neurophysiology

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“…The reaction of CNS to hyperventilation test to induce different changes such as the intensity of breathing, the glucose level in the blood, a patient's posture (sitting position) has been reported ( 4 , 35 ). Based on the EEG observations, a group of researchers ( 36 – 38 ) indicated that children (under 12 years) were particularly vulnerable to hypocapnia developed in response to hyperventilation. Our results showed that the sensitivity to hyperventilation was high in all ages and sex.…”

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confidence: 99%

EEG Characteristics to Hyperventilation by Age and Sex in Patients With Various Neurological Disorders

Khachidze¹,

Gugushvili²,

Advadze

2021

Front. Neurol.

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Introduction: Hyperventilation provocation test(s) (HPT) concomitant to electroencephalography (EEG) may detect hidden disorders of the nervous system (CNS). There are various types of abnormal EEG in responses to HPT that provoke different interpretations. However, it is not evident how the onset time of pathological EEG responses to hyperventilation (PERH) reveals dysfunction of the CNS in humans. It is also not clear if age and biological sex affect EEG characteristics in response to HPT. Our previous studies have revealed three types of PERH (disorganization of basic rhythm, paroxysmal discharges, epileptiform activity) concerning the manifestation time of first, second, and third minutes. The current work aims to classify the PERH with regards to age (3–6, 7–12, 13–18, 19–30, 31–50, 50 > year) and the biological sex of the patients.Methods: This study examined the EEG of 985 outpatients with various functional disorders of the CNS. The patients were assigned to one of three experimental groups based on the time occurrence of PERH in response to the HPT.Results: The disorganized basic EEG rhythm in the first, second, third minute of HPT was observed across all age and sex groups. All three types of PERH in the first minute were comparable for both sexes. However, some discrepancies between females compared to males were observed in the second and third minutes. All three types of PERH in the first and the second minutes were found only in women. The second type of PERH has revealed at the second minute of PHT in 13–18-year-old five girls.Conclusion: The three main types of PERH were detected at the first minute in all age groups and sex in patients with various CNS dysfunctions. It is diagnostically informative should be used as a marker during the monitoring of treatment. The specific activity of the brain's response to HPT depends on time, age, sex. The data indicate that taking into account sex differences and age during HPT leads to better results. The sensitivity and severity of the NS reaction toward hypocapnia, stress, and emotion increase in women. Therefore, in such cases should not be recommended to expand functional loads.

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Hyperventilation Test-Related Changes of EEG in Children: Peculiarities Detected Using Periodometric Analysis

Cited by 2 publications

References 8 publications

Complex estimation of adaptation abilities of the organism in children using the indices of responsiveness of the cardiovascular system and characteristics of EEG

Complex estimation of adaptation abilities of the organism in children using the indices of responsiveness of the cardiovascular system and characteristics of EEG

EEG Characteristics to Hyperventilation by Age and Sex in Patients With Various Neurological Disorders

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