[Validation of ballistocardiography data for predicting the sleep efficiency in healthy individuals and patients with insomnia].

Objective: To identify valid parameters of heart rate variability (HRV) and musculoskeletal movements based on ballistocardiography data, which allow predicting the sleep efficiency (SE) index in healthy individuals and patients with insomnia.

Material And Methods: Ten healthy individuals and 14 patients with chronic insomnia were examined using polysomnography and ballistocardiography. A regression analysis of the data was carried out, as well as a reliability check of the resulting mathematical model.

Dynamics of Alpha Rhythm Peak Frequency during Falling Asleep.

Changes in the frequency characteristics of EEG alpha rhythm in during falling asleep were studied in three healthy individuals under conditions of long-term isolation (MARS-500 project). Falling asleep was preceded by enhanced alpha rhythm frequency. An inverse correlation between the duration of falling asleep and prevailing alpha rhythm frequency during active and relaxed wakefulness was revealed in the left hemisphere.

[The psychophysiological features of nonepileptic paroxysmal disorders].

22 patients with panic disorder without agoraphobia, 19 patients with paroxysmal atrial fibrillation and 43 healthy control subjects with use clinic technique, psychometric, neuropsychological, neurophysiological methods (quantitative EEG and auditory event-related potentials P300) were examined. Patients with panic disorder was differed from patients with paroxysmal atrial fibrillation by higher level of anxiety and greater degree cognitive functions disturbances. In comparison with healthy control subjects at panic disorders increased of P300 peak amplitude and the spectral power of EEG beta and theta bands in the right hemisphere was observed, at paroxysmal atrial fibrillation--decreased of P300 peak amplitude and the spectral power of EEG beta band in the both hemispheres.

[Psychophysiological characteristics of panic disorder and generalized anxiety disorder].

We studied 34 patients with panic disorder, 32 patients with generalized anxiety disorder and 29 healthy controls using clinical-neurological, psychometric, neuropsychological and neurophysiological (auditory event-related potentials) methods. Patients were characterized by pronounced autonomic dysfunctions, a higher level of anxiety and depression as well as cognitive function disturbances in the form of impairment of short-term memory and directed attention in comparison with healthy controls. Patients with generalized anxiety disorder differed from patients with panic disorder by the higher level of anxiety, greater degree of depression and more expressed disturbances of short-term memory and directed attention.

[Sleep structure instability in healthy men under conditions of 105-day isolation experiment "Mars-105"].

Night-to-night stability of falling asleep and duration of wakefulness in the sleep was studied in six healthy male subjects under conditions of 105-day isolation experiment "Mars-105". Polysomnography records were carried out in each subject during five nights taken in regular intervals within the experiment. Three subjects demonstrated high stability of falling asleep and wakefulness in sleep (group I), whereas in the remaining three subjects stability of these characteristics was low (group [I).

Study of nociceptive flexion reflex in healthy subjects and patients with chronic neuropathic pain syndrome.

Nociceptive flexion reflex was measured in healthy subjects and patients with chronic neuropathic pain (diabetic distal symmetric sensorimotor polyneuropathy). The study of nociceptive flexion reflex revealed reduction of subjective pain threshold and reflex threshold in patients compared with healthy persons reflecting deficit of descending antinociceptive influences in the CNS.

[The state of nociceptive and antinociceptive brain systems in patients with the pain form of diabetic polyneuropathy].

We studied 48 patients with the pain form of distal symmetric sensorimotor diabetic polyneuropathy (DPN) before and after polytherapy and 17 sex- and age-matched healthy people. Clinical/neurological, psychometric and neurophysiologic (recording of nociceptive flexor reflex (NFR) and exteroceptive suppression of involuntary muscle activity) methods were used. Lower NFR thresholds and coefficients pain threshold/reflex threshold (Pt/Rt) as well as the presence of moderately-severe depression and high anxiety level were found in patients with DPN.

[Hand motor dysfunctions in computer users].

It were studied 239 female typists aged from 16 to 62 years (mean age 20,1±7,8 years) using author's questionnaire for computer typists to assess hand function and develop preventive measures of disturbances revealed. Indirect signs of tunnel hand neuropathy (27,2%), focal hand dystonia (21,4%) and muscular-tonic syndromes of different localization (18%) have been found. Typists are a risk group of fine hand motor dysfunctions.

[The use of P300 event-related potentials in the evaluation of the effectiveness of therapy of episodic exertional headaches].

Fifteen healthy individuals and 17 patients with episodic exertional headaches were examined before and after treatment with citalopram using P300 event-related potentials. Unlike healthy controls, patients with headaches before treatment displayed an increase in P300 amplitude and the loss of its habituation, which correlated with a decrease in cognitive functions. The treatment lowered the degree of pain and vegetative syndromes, normalized P300 parameters, and improved cognitive functions.

[An electrophysiological study of the rehabilitation of cognitive functions during the treatment of patients with panic disorders].

To investigate psychophysiological features of panic disorder (PD) before and after treatment with citalopram, P300 auditory event-related potentials (ERPs) were recorded in 31 patients who met the DSM-IV criteria of PD and 24 age- and sex-matched normal controls. The ERPs were recorded during a standard two-tone discrimination task (oddball task). The treatment was conducted as a monotherapy during 6 weeks, with citalopram dosage of 20 mg/day.

Interhemispheric EEG asymmetry in patients with insomnia during nocturnal sleep.

Sleep EEG was recorded and analyzed in patients with neurotic insomnia. It was found that interhemispheric asymmetry in the same individual can vary during sleep from right-hemispheric to left-hemispheric. Interhemispheric EEG asymmetry is closely related to the stage of sleep.

[A psychoneurophysiological evaluation of non-specific cerebral systems in patients with permanent autonomic disorders of psychogenic etiology during therapy].

Fifteen patients with permanent vegetative disorders combined with a pronounced anxiety were examined before and after treatment by the Nott drug. The clinical-and-neurological technique, psychometric evaluation of cognitive functions and the neurophysiological method of acoustic cognitive induced potentials P300 were made use of. Before treatment, pronounced vegetative anxiety-related and cognitive disorders were observed in patients.

[A pathogenesis of post-stroke depression].

Thirty-one patients (17 males and 14 females aged 30-74 years, mean age 61 years) with depression were examined 3-6 months after ischemic stroke. Control group included 10 sex- and age-matched healthy subjects. Neurological, psychological and psychometric tests (the Hamilton, Beck, Spilberger, mini mental scales and Quality of Life questionnaire) were conducted.

[Specific features of the structure of sleep and personality under the conditions of chronic emotional stress and methods of improving the adaptive abilities of man].

The results of a complex psychophysiological study of human sleep in the chronic stress condition are described. 20 patients with complaints of night sleep disturbances in the chronic stress condition and 10 healthy controls were examined by polysomnography. Profound changes of the quantitative and qualitative sleep parameters, mainly, related with the slow sleep phase, sleep delta characteristics and adaptive wakefulness mechanisms.

[Segmental organization of sleep].

Segmental organization of sleep was studied in healthy subjects and insomniac patients. Theoretical and practical aspects of sleep organization are discussed. The disintegration syndrome (decreased stability of development of sleep stage segments and change in sleep stage sequence characteristic of normal sleep) is an inherent feature of sleep disorders and a fine index of adaptive possibilities of sleep systems.

[Clinical and psychological analysis of eating disorders in obesity].

Unlabelled: Clinical neurological study and psychometric testing of 36 women with primary obesity, body weight index being over 30 kg/m2, have been conducted. The sample was divided into 4 groups: 1st--without emotiogenic eating behavior (EEB); 2d--with permanent EEB; 3d--with compulsive eating disorder; 4s--with night eating syndrome. All patients did not differ by body weight, body weight index, hereditary anamnesis data and neuroendocrinic disorder expression.

[The typology of the objective disorders of night sleep in insomnia].

The most frequent polygraphic manifestations of insomnia were analysed in 39 neurotic patients with disorders of night sleep (NS). The frequency of pathological alterations of the objective characteristics of NS was determined after examination of the data obtained. Four types of sleep alterations were recognized.

[The effect of Imovane on sleep structure and respiratory indices during sleep in insomnia patients].

Night sleep was examined in 120 patients with different forms of insomnia. The positive effect of Imovane was shown both on presomnic and intrasomnic disorders. Transitory side effects (dryness, bitter taste in the mouth) were in some cases that didn't need cessation of therapy.

[The wakefulness-sleep cycle during antiorthostatic hypokinesia].

Studies on the wake-sleep cycle with participation of eight female volunteers were performed before, during, and after a 120-day bed rest with the head-end of bed tilted down at 6 degrees (HDT). Methods of polysomnography and actography were applied. The test-subjects were assigned into 2 groups.

[The effect of Lendormin (brotizolam) on the sleep structure and subjective assessment of sleep in insomnia patients].

The influence of Lendormine (diazepine derivative) both on the sleep structure and subjective estimation of sleep was examined in 25 patients at the age of 19-64 years old with neurotic insomnia. The investigation was performed before, during and after 10 days of treatment (0.25 mg before the sleep time).

[The epidemiology of autonomic disorders in Moscow schoolchildren].

Epidemiological survey of 2076 schoolchildren in the city of Moscow aged 7-15 revealed vegetative disorders in 63.8% of the examinees. Sex- and age-specific features of clinical presentation, complaints are described.