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Biomedical subjects

A R Agababian

Publications and source records attributed to A R Agababian.

7 recordsLinked to original sources
PubMedDate not supplied

[The EEG indices of the functional status of the operator in prolonged monotonous work at a computer].

The EEG data obtained in 4-hour experiments with simulation of monotonous performance at a computer display were analyzed. A certain difference in the dynamics of the functional state was revealed between the groups of subjects which differed in their background level of cortical activation. Practically the same performance efficiency in these groups was supported by different mechanisms: via self-regulation mechanisms in the subjects with a high initial level of cortical activity and by involvement of "self-correction" realized through activation of nonspecific subcortical brain structures. The development of the excessive stress in the second group of subjects expressed in an increase of theta rhythm power density indicated the higher "physiological cost" of monotonous operator's work for persons with low level of background cortical activation.

Adaptation, Physiological↗
PubMedDate not supplied

[Functional state of the autonomic nervous system according to the data of heart activity during performance of a computerized visual-spatial task].

The influence of the performance of a computerized visio-spatial task on the state of the autonomic nervous system of PC operators was studied. Statistical characteristics of the operator's heart rhythm during the 3-hour period of work on a computer were analyzed using Baevsky's method of variational pulsometry. The operators were classified in three groups by the character of their reaction to loading. It was suggested that the visio-spatial task performance on a computer could act as a stress factor only on a certain category of people.

Adult↗
PubMedDate not supplied

[Role of the right brain hemisphere in training for the operator work].

Functional state of the human right brain hemisphere was studied during simulation of 4-hour operator's training work with a computer in novel conditions. Participants of the experiments differed in the degree of extraversion and baseline level of cortical activity. The obtained results suggest that the role of the right hemisphere in the process of simulated activity consists in reception and primary processing of information. This hemisphere is not involved in the correction of cortical activation to the optimal level of activity, which is necessary for the efficient performance of a task.

Adult↗
PubMedDate not supplied

[The individual typological characteristics of operator activity during long-term monotonous work on the computer].

Individual neurophysiological and psychophysiological characteristics were analyzed in two groups of subjects with different extraversion and genetically determined levels of cortical activity during learning the novel for them monotonous computer operation. Most of the subjects improved their performance to the end of four-hour work. The degree of visual fatigue correlated with changes in P70 component of the evoked potentials. The intergroup difference was revealed in overcoming the visual discomfort during attention concentration. The visual cortex was facilitated in the introverts with high-voltage cortical activity (1st group) and disfacilitated in the extraverts with the low-voltage cortical activity (2nd group). Increase of the simple motor reaction time in the extraverts is considered as a result of temporary impairment of the visual function during the monotonous operator's work, and the worsening of the emotional condition as a consequence of the visual discomfort. The problems are discussed concerning different adaptation mechanisms in realization of the activity under study depending on the genetically determined features of the CNS.

Adaptation, Physiological↗