The dynamics of the spatial synchronization of brain biopotentials in conditions of intense attention in the hypnotic state.

Twelve mentally healthy women aged 21-38 years were studied in the state of consciousness and hypnosis. The main study method was electroencephalography with assessment of the spatial synchronization of brain biopotentials (SSBP). Suggestion of high-intensity attention delivered to subjects in the hypnotic state was found to lead to significant reorganization of SSBP, with increases in SSBP between both occipital areas, the right temporal area, and other parts of the brain. The dynamics of brain SSBP in intense attention were opposite in the hypnotic and conscious states, which appears to result from the temporary exclusion in the hypnotic state of the functions of the frontal areas of the cortex responsible for conscious control and regulation of ongoing activity.

[Dynamics of spatial synchronization of brain biopotentials in intensive attention during hypnotic state]. / Dinamika prostranstvennoi sinkhronizatsii biopotentsialov mozga pri intensivnom vnimanii v gipnoticheskom sostoianii.

Twelve psychiatrically normal women aged 21-38 years were examined in awakened and hypnotic state using an EEG method with evaluation of spatial synchronization of brain biopotentials (SSBB). Suggesting of high intensive attention to the subjects in hypnotic state leads to substantial reorganization of SSBB manifesting as SSBB increase between both occipital regions, right temporal and other brain cortex areas. Dynamics of brain SSBB in intensive attention in awakened and hypnotic state is of opposite character that is likely to be the result of temporary switching off of the functions of the frontal brain cortex areas, providing the conscious control and regulation of the current activity.

[The effect of geomagnetic disturbances on the functions of attention and memory]. / Vliianie geomagnitnykh vozmushchenii na funktsii vnimaniia i pamiati.

The effect of geomagnetic disturbances on the basic types of voluntary attention and short-term memory was studied. The three-hour K-indices and diurnal AK-indices as parameters of geomagnetic disturbances and psychological tests of attention and memory were used for IBM PC/AT processing. As a result, the test subjects were distributed into two groups according as the attention and memory parameters exhibited a decline or a rise. Decrement of memory was more apparent than that of attention. The short-term memory displayed a decline more frequently than mechanical or image-bearing, whereas the intensity of attention increased more often than memory span or distribution. These data suggest a non-specific impact of geomagnetic disturbances on the processes of attention and memory in humans.

[Space-time organization of recruitment in rabbit cerebral cortex]. / Prostranstvenno-vremennaia organizatsiia reaktsii vovlecheniia v kore bol'shikh polusharii krolika.

The spatio-temporal organization of the recruiting responses in the cerebral cortex was studied in an acute experiment on alert rabbits. Local low-frequency stimulation of the thalamic central medial nucleus leads to the appearance of both "generalized" and "local" spindles. Temporal shifts of 0.1--2 sec. occur in the appearance of the "generalized" spindles. The performed analysis permits the assumption that under local stimulation the spatio-temporal dynamics of the recruiting response is connected with the appearance of several spindle pacemakers which differ in their characteristics, e. g. in the speed of the excitability recovery and in their interrelations.