Nikonova, Evgenia Y.
Publications by Nikonova, Evgenia Y.
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