S. V. Afanas'ev

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Simultaneous recordings were made of the spike activity of groups of 6–7 neurons in the putamen in two monkeys (Macaca nemestrina and Macaca mulatta) during performance of alternative spatial selection. Discriminant analysis was used to evaluate the magnitude of rearrangements in spike activity in groups of neurons during transitions from each step of the(More)
Putamen neuron spike activity associated with motor and nonmotor functions was studied in monkeys trained to behavioral programs consisting of a series of sequential actions. In general, each putamen neuron was activated during particular behavior fragments. The association of each individual neostriatal neuron with particular behavioral fragments was not(More)
It has been shown that paradoxical sleep (PS) total time (TT) in euthermia phase of hibernation cycle (winter sleep) can be compared with its mean values in euthermia season. Ultradian fluctuations of PS episodes duration, TT and phase number as well as bradycardia microintervals are revealed in euthermia phase dynamics. Amplitude of these fluctuations(More)
The work of the central integrative neurons of the brain is concerned with the total evaluation of the heterogeneous signals and signals of different sensory modality, coming to these neurons via the parallel inputs. Due to the processing of this information central neurons participate in organization of the different acts of animal and in mechanisms of(More)
Significant differences were found in collective unit activity of 6 neostriatum neurons associated with performance of either left- or right-sided task by monkeys: at the moment of decision-making regarding the direction of the movement, and after its completion, irrespective of correctness of the choice. The differences at the moment of the programme(More)
The striate body or striatum is the largest subcortical nucleus, where efferent fibers from all regions of the brain cortex converge [1]. According to the results of numerous experiments, the striatum affects almost all brain functions. Therefore, its own functions are various. The striatum is considered to serve as a focus and filter of the cortical(More)
Analysis is presented of word associations produced by subjects with left hemispheric (group 1), right hemispheric (group 2), and bilateral (group 3) speech representation. The strategy for producing extralinguistic responses was found to prevail over the strategy for producing linguistic associations in all subjects, irrespective of their type of speech(More)
The activity of central integrative brain neurons is associated with the overall assessment of functionally diverse signals of different sensory modalities which converge on these neurons via parallel inputs. Processing this information, these neurons take part in organizing the animal's various actions and in the mechanisms involved in switching from one(More)
Spike activity was recorded from several neurons in the monkey striatum during the performance of a complex behavioral program including differentiation of conditioned signals of different levels of complexity. The most characteristic feature of spike activity in striatal neurons during behavior was found not to be the selective involvement of particular(More)