Vsevolod Lyakhovetskii

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The errors of right- and left-handers were analyzed when they performed memorized sequences by right or the left hand during the task that activates positional coding: after six to ten times, the order of movements changed (the positions remained the same during the task). The task was at first performed by one (initial) hand, right or left, and then by the(More)
An important stage in learning, i.e., the acquisition of a new skill, is the repetitive reproduction of a sequence of movements, which plays a significant role in the formation of motor stereotypies. Two groups of right-handed subjects reproduced (6–10 repeats) sequences of movements guided by the experimenter, sequences consisting of six positions, first(More)
The spatial distribution of horizontal internal connections in field 17 of the cat cortex was studied after microiontophoretic application of horseradish peroxidase to individual cortical columns. Cluster analysis of the distribution of labeled cells in the superficial layers in the tangential plane of the cortex was performed. Field 17 included 7 ± 1(More)
Age-specific features of motor short-term memory were studied. Two groups of right-handed volunteers (18-25 and 35-60 years old) reproduced the memorized sequence of six movements by the right hand or by the left one. The mean values of erroneous movements are shown to be significantly higher in elder group, demonstrating the age-dependent reduction of(More)
An important stage of learning a new skill is repetitive reproduction of one and the same sequence of movements, which plays a significant role in forming of the movement stereotypes. Two groups of right-handers repeatedly memorized (6-10 repetitions) the sequences of their hand transitions by experimenter in 6 positions, firstly by the right hand (RH), and(More)
Subjects’ errors in reproducing a remembered series of movements in the absence of visual feedback were analyzed in relation to previous performance of the task with the right and left hands (“prehistory”) and the spatial positioning of the movement target – randomly or ordered – according to a rule known to the subjects. Information relating to ordered(More)
Using studies of the right and left hemisphere’s specialization for positional and vector coding, we analyzed the errors made by right- and left-handers while reproducing sequences of right and left hand movements in a task that activates vector coding by changing the order of movements in memorized sequences. The task was performed first with one hand(More)
The aim of the present work was to conduct a morphometric analysis of the cluster organization of neurons forming interzonal corticocortical connections in the visual cortex. The investigations used a method based on retrograde transport of horseradish peroxidase and mathematical analysis of the spatial distribution of labeled cells. Measurements yielded(More)
We report here a number of characteristics of the perception of short time intervals by humans (duration up to 3 sec). A short range of time intervals was assessed using a large set of durations (50) differing from each other by a small amount (0.06 sec). This provided the first identification of the structure of the subjective scales by which subjects(More)