![]() The patients were assigned to one of three experimental groups based on the time occurrence of PERH in response to the HPT. Methods: This study examined the EEG of 985 outpatients with various functional disorders of the CNS. 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. 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. It is also not clear if age and biological sex affect EEG characteristics in response to HPT. However, it is not evident how the onset time of pathological EEG responses to hyperventilation (PERH) reveals dysfunction of the CNS in humans. There are various types of abnormal EEG in responses to HPT that provoke different interpretations. Introduction: Hyperventilation provocation test(s) (HPT) concomitant to electroencephalography (EEG) may detect hidden disorders of the nervous system (CNS). 2Faculty of Medicine, Georgian National University SEU, Tbilisi, Georgia.Beritashvili Centre of Experimental Biomedicine. 1Department of Human Psychophysiology, I.Irma Khachidze 1,2 * Manana Gugushvili 1 Maia Advadze 2 ![]()
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