Kozlovskiy, Stanislav A.
Publications by Kozlovskiy, Stanislav A.
Kozlovskiy S. A., Shirenova S. D., Neklyudova A. K., Vartanov A. V.(2017). Brain mechanisms of the Tip-of-the-Tongue state:An electroencephalography-based source localization study. Psychology in Russia: State of the Art, 10 (3), 218-230
Background. The Tip-Of-the-Tongue (TOT) state occurs when a person fails to retrieve a familiar word, e.g., a name, from long-term memory, while knowing perfectly well that the forgotten word exists in memory and being able to report some information about it (semantic associations, the first letter, the number of syllables, etc.).
Objective and method. In the present work, we studied the activation of brain structures during the TOT state. The participants (N = 20; age 21.5 ± 4.1) viewed portraits of movie stars whose names they were asked to remember. Event related potentials (ERP) were registered in three conditions: 1) the participant remembered the name; 2) the participant did not know the name; 3) the participant knew the name but could not remember it (TOT-state). The sources of cortical activation were computed (DSPM algorithm).
Results. Time intervals demonstrating significant differences (t-test) in activation among the three conditions were calculated for each activated area, so that up to four different stages of processing could be delineated. According to our analysis, face perception involves activation of the visual cortex (left cuneus and right precuneus cortices), banks of the superior temporal sulci, poles of frontal and temporal lobes, and fusiform gyrus. The early activation does not depend on the successful retrieval of the name. A second increase in activation of the visual cortex is present at a later stage of processing, when name retrieval fails or if it is impeded.
Conclusion. We have shown that successful face recognition involves activation of the posterior cingulate cortex and the isthmus of the cingulate cortex in both hemi- spheres. Additionally, the parahippocampal gyrus is less active at the early stages and more active at the later stages of processing in the TOT-state, when name retrieval from the long-term memory fails.
Themes: Cognitive psychology
Keywords: tip-of-the-tongue (TOT), memory retrieval, verbatim recollection, electro- encephalography (EEG), source localization, event related potentials (ERP), posterior cingulate cortex, parahippocampal gyrus, isthmus of cingulate gyrus
Available Online: 09.30.2017
Stanislav A. Kozlovskiy, Maria M. Pyasik, Aleksander V. Vartanov, Evgenia Yu. Nikonova (2013). Verbal working memory: magnetic resonance, morphometric analysis and a psychophisiological model. Psychology in Russia: State of the Art, 6(3), 19-30
Neuropsychological characteristics of verbal working memory (memory capacity, permanency, and different types of memory errors) of 43 healthy subjects of older age were compared with the anatomical characteristics of their brain structures (volume of the hippocampi and the caudate nuclei, size of the cingulate-cortex regions of both hemispheres). The obtained data demonstrate a correlation between the permanency of verbal- information maintenance and left caudate-nucleus volume and a positive correlation between associative-memory capacity and left hippocampus volume. A decline in the number of verbal-memory errors (confabulations) is related to the increased size of the left anterior cingulate cortex. Furthermore, verbal working-memory capacity and permanency correlate negatively with the size of the left posterior dorsal cingulate cortex, whereas the number of fluctuations and word replacements correlate positively with the increased size of this brain region. We suggest a psychophysiological model of verbalstimulus maintenance in working memory based on the results of our study and published research data.
Themes: “Science in Dialogue” — 10th Sino-German Workshop Selected Papers / Psychophysiology
Keywords: magnetic resonance morphometric analysis, working memory, verbal memory, caudate nucleus, cingulate cortex, hippocampus, working-memory model
Available Online: 12.15.2013
Kozlovskiy S.A., Vartanov A.V., Nikonova E.Y., Pyasik M.M., Velichkovsky B.M. (2012). The Cingulate Cortex and Human Memory Processes. Psychology in Russia: State of the Art, 5, 231-243
This study presents data from a magnetic-resonance morphometric (MRMM) analysis of the main regions of the cingulate cortex (in both hemispheres) and their role in memory processes in a group of healthy, females of older age. The results demonstrate a statistically reliable correlation between overall performance and the type of errors in different neuropsychological memory tests and the relative size of these regions. The discovered pattern of correlations can be explained by hypothesizing the reciprocal functional influence of the two major areas of the cingulate cortex – its anterior and posterior dorsal parts – on performance in neuropsychological memory tests.
Keywords: cingulate cortex, cingulate gyrus, magnetic-resonance morphometric analysis, human neuropsychology, memory.
Available Online: 12.01.2012