[Formation of spatial short-term memory in 18-54-month old children].

The development of the spatial short-term memory (SSTM) in children aged 18-54-months was assessed by performance of the inverted delayed-response task (IDR). A child perceived the localization of a target object in one of the two containers (left or right) situated on a table in front of the child. The distance between the containers was 30 cm.

Significance of emotional excitation in the mechanisms of spatial short-term memory in lower apes.

Correlates of variation in the level of emotional tension are studied in long-term experiments on adult monkeys. The simultaneous appearance of the electrodermal response and of a change in the heart rate is shown to reflect more accurately a rise in the level of emotional tension. Continuous recording of autonomic indexes reveals an increase in tension level during the presentation of conditioned signals and the performance of the motor response in the spatial delayed response test program.

[Role of emotional excitation in mechanisms of spatial short-term memory in lower monkeys].

Correlates of the changes of emotional tension level were studied in adult macaca rhesus. Simultaneous appearance of skin-galvanic responses and changes of heart rate were shown to reflect the increase of emotional tension level. The latter was revealed with continuous recording of the above vegetative indices during presentation of conditioned signals and performance of spatial delayed response.

[Neocortical electrical activity of cats with premesencephalic brain stem section under chronic experimental conditions].

In 24 cats, premesencephalic section of the brain-stem affected the sleep-wakefulness cycle and caused desynchronization of the neocortical activity 3-4 days after total isolation of the mesencephalic RF. The data obtained corroborates the existence of a certain brain structure situated more rostrally than the mesencephalic RF which is able to cause by itself the neocortical activation.

[The effect of peripheral stimulation on the electrical activity of the neocortex in chronic premesencephalic cats].

Chronic experiments were carried out with 19 adult cats. It is demonstrated that following a premesencephalic sectioning of the brain stem, with the lemniscal pathways being spared, on the second and third day after the surgery, auditory, olfactory and skin stimulations caused diffusive activation of the neocortex. Photic stimulation, though evoking responses in the visual cortex, was unable to desynchronize the neocortical electrical activity.