[Heart rhythm in humans with different processing levels of acoustic information].

The peculiarities of the heart rhythm regulation were investigated in humans during the processing of acoustic information. Statistically significant differences were found in individuals with different levels of auditory-motor reactions according to the heart rhythm characteristics. Individuals with the high level of reactions were characterized by significantly lower total power spectrum (TP=1276.2 ms2), by the power spectrum of high (HL=280.1 ms12) and very low frequencies (VLF-469.8 ms2), as well as by low indexes of standard deviation of R-R intervals (SDNN=37.4 ms), when compared with the persons with the low level of reactions (5248.8; 866.7; 1937.0; 69.8 ms2). The correlation analysis confirmed the dif- ferences between the groups ol persons with adtierent number of processed information and variable (r=0.41, P<0.05) and spectral characteristics of heart rate (r=-0.49--0.56, P<0.05). Different strategies of activation of non-specific brain systems in formation of psycho-physiological reactions and participation of heart rhythm regulatory mechanisms in vegetative support of auditory information processing are discussed.

[Heart rhythm in students with different individual and typological characteristics of the higher nervous activity during examination stress]. / Sertsevyi rytm u studentiv z riznymy indyvidual'notypolohichnymy vlastyvostiamy vyshchoï nervovoï diial'nosti za umov emotsiinoho stresu.

The responses of the vegetative nervous system to a stress situation at the examination psycho--emotional strain were investigated on the students possessing different individual-typological characteristics of the higher nervous activity (HNA). We observed a decrease in the parasympathetic influences on the heart rate and an activation of the humoral--metabolic and sympathetic influences in all the students under exploration. It was also shown that the resistance of the students to the examination stress and the type of their vegetative reactions, to a large extent, were determined by both the individual-typological peculiarities of the HNA and the initial psychological state. The question if the vegetative supply of the mental activity at the examination stress reflects the individual-typological characteristics of the HNA has being discussed.

[Comparative analysis of various parameters of nervous system activity in humans]. / Porivnial'nyi analiz riznykh pokaznykiv syly nervovykh protsesiv u liudyny.

It was established that the showing and coefficient of the nervous system power were connected with each other only in the conditions of determining them during working up of complex sensomotor information. The coefficient of the nervous system power determined in the conditions of working up of complex sensomotor information is not connected with showings of the nervous system power and that is why it can't be an objective showing for characteristic of the individual typological peculiarities of the high nervous activity.

[Functional state of the central nervous system in people with varying functional agility of the nervous processes while transforming information of varying complexity]. / Funktsional'nyi stan tsentral'noï nervovoï systemy za umov pererobky informatsiï riznoho stupenia skladnosti u osib z riznym rivnem rukhlyvosti nervovykh protsesiv.

Relations between functional agility of the nervous processes (FANP) and functional state (FS) of the central nervous system at performing simple and difficult sensomotor tasks have been studied. It has been shown that FANP is of the exceptional importance in forming FS of the central nervous system only to perform difficult mental tasks.