[ECG parameters in initial neurosensory hypoacusis in early hypertension].

ECG and audiometry parameters were studied in conventional (0.125-8 kHz) and extended (9-16 kHz) frequency range in 115 patients with early neurosensory hypoacusis (NSH) in combination with initial hypertension or episodes of blood pressure rise. The patients were divided into two groups: group 1 (n=60) consisted of hypertensive patients with NSH, group 2--of NSH patients with episodes of high blood pressure.

[Distribution of main EEG rhythms in patients with initial neurosensory hearing disorders of vascular genesis].

Forty patients with neurosensory hearing disorders of vascular genesis were examined and divided into two groups. Patients with tone hearing disorders in conventional (0.125-8 kHz) and extended (9-16 kHz) frequency ranges entered group 1, those with such disorders in the extended range--group 2.

[Value of cortical acoustic evoked potentials in sensorineural hypoacusis of vascular genesis].

Sixty patients 19 to 43 years of age (28 females and 22 males) with neurosensory hypoacusis (NH) of vascular genesis were examined using long-latent acoustic evoked potentials. The patients were divided into three groups. Group 1 consisted of 20 NH patients with initial hypertension, frequent headache, vertigo, sleeplessness, irritability but no complaints of hearing problems.

[EEG and cardiac activity indices in patients with radiation-induced sensorineural hearing loss].

EEG was made in 47 patients with neurosensory hypoacusis (NSH) of radiation origin and 20 healthy subjects unexposed to radiation. These findings were compared to those on cardiac activity. The study shows that both in the temporal and occipital leads of patients with cardiac disorders alpha-rhythm amplitude and alpha-index are significantly less than in the control group.

[Brain stem structures in the acoustic pathways in radiation exposed persons].

Short-latent acoustic evoked potentials were analysed in 163 persons exposed to radiation after the Chernobyl accident regarding their cardiovascular status. Alterations of the brain stem structures of the acoustic analyzer were most pronounced in radiation-exposed persons with cardiovascular diseases. Such alterations were also registered in 50% of radiation-exposed subjects with normal heart activity.

[The relationship between the condition of the brain stem compartments of the acoustic analyzer and rheoencephalography in people who participated in the liquidation of the consequences of the Chernobyl' nuclear plant disaster].

Pure-tone and speech threshold and suprathreshold audiometry, short-latent acoustic evoked potentials (SLAEP) and rheoencephalography (REG) were applied in examination of 67 patients with neurosensory hypoacusis (NSH) aged 21 to 45 years. These patients worked as wreckers in the zone contaminated with radionuclides 5 years and later after the Chernobyl accident. Relationships between functional condition of the truncal structures of the acoustic analyser and cerebral hemodynamics were studied.

[Preventive care and treatment of hearing problems in persons exposed to radiation].

Neurosensory hypoacusis (NSHA) was treated in 193 patients exposed to radiation consequently to the Chernobyl accident. The article describes changes observed in the examinees on audiograms, ECG, rheoencephalograms (REG) and acoustic evoked potentials. Treatment of patients with radiation-induced NSHA was aimed at normalization of tonicity of the cerebral vessels, venous outflow, pulse blood filling, arterial pressure, bioelectric activity of the brain, cardiac activity with account to hearing defects in different portions of the acoustic system.

[Acoustic evoked potentials in patients with vocal problems in relation to their hearing in wide frequency range].

The function of different compartments of the acoustic analyser was assessed by the findings at tonal audiometry in standard and extended range of frequencies (10, 12, 14 and 16 kHz) as well as by characteristics of acoustic evoked potentials. A total of 62 patients with chronic vocal dysfunction (CVD) and 20 subjects with normal hearing and voice were examined. CVD patients were found to have: normal hearing both in standard and extended range of frequencies (25.

[Enzyme activity and level of GABA-shunt substrates in rat brain during repeated exposure to hypoglycemic doses of insulin].

The activity of glutamate decarboxylase, GABA-, aspartate-and alanine aminotransferases, the content of GABA, glutamate, aspartate and alanine were studied in the brain hemispheres and stem of rats that were undergoing the hypoglycemic coma as well as those rats had undergone 7-9 comas on the second day after the last coma. In hypoglycemia, the brain's content of glutamate, alanine and GABA decreased and content of aspartate increased; the activity of enzymes investigated did not change. On the second day after 7-9th hypoglycemic coma, the decrease of activity of glutamate decarboxylase in hemispheres and the decrease of GABA amount in brain stem were detected.

[Time aspects of short-latency acoustic evoked potentials in cleaners-up after the Chernobyl AES accident who have voice disorders].

Brain stem SLAEP were compared to EEG readings in patients with vocal problems consequent to low-dose radiation received after the Chernobyl accident. Versus control subjects, the patients had significantly (p < 0.01) longer latent periods of SLAEP waves 11 and V as well as the interpeak interval I-V.

[Time factors in the acoustic reflex of intra-aural muscles and brain stem acoustic evoked potentials in workers with occupational hearing loss and normal and delayed speech discrimination].

Time characteristics of brain stem acoustic evoked potentials and acoustic reflex of the intra-aural muscles were measured in workers with occupational hypoacusis having normal and delayed capacity for speech discrimination. The findings provided evidence for inhibition of speech information analysis at the level of the brain stem and dissociation of interaction between the brain stem nuclei.

[State of auditory function based on data of audiometry and dynamic impedance-metry in persons exposed to radiation during liquidation of the Chernobyl AES accident].

A total of 251 men at the age of 23 to 50 have been examined with the use of audiometry and dynamic impedance metry who had obtained various doses of radiation connected with the work at the Chernobyl Power Plant. It was established that in 57.8% of the cases the audition was within the physiological norm and in 42.

[Amplitude and time characteristics of latent auditory evoked potentials in occupational hearing disorders with and without the recruitment phenomenon].

Cortical evoked potentials (CEP) of workers exposed to industrial noise were recorded by an Amplaid MK-6 unit (Italy). They suffered from neurosensory hypoacusis with or without the recruitment phenomenon. The results were compared with those derived from patients with neurosensory hypoacusis of vascular origin, aggravated by the recruitment phenomenon, and in the cortical structures of the hearing organ in the case of neurosensory hypoacusis of both vascular and noise origin.

[Intensity of lipid peroxidation in the tissues of rats during hypokinesia].

The intensity of lipid peroxidation in the homogenates and mitochondria of the liver, heart and skeletal muscle of hypokinetic rats was measured. The primary products of lipid peroxidation, i. e.