Abstract
Development of the prefrontal cortex and its connectivity with different cortical areas has strong implications for the improvement of working memory. The aim of this research was to characterize the interhemispheric (INTER) prefrontal and hemispheric (INTRA) frontopolar-dorsolateral prefrontal and dorsolateral prefrontal-parietal correlation (r) in children, adolescents and adults during performance of a visuospatial working memory task (VSWM). INTERr and INTRAr of 36 different aged male participants (11 - 13, 18 - 20 and 26 - 30 years old) were calculated during performance of the Corsi Block-Tapping task, which assessed VSWM. On this task, children showed lower correct responses than adolescents and adults. Adults also showed lower total execution times than children and adolescents, with a more efficient performance. On the EEGs, the older groups showed both higher interfrontal correlations and left and right prefronto-parietal correlations than children. According to our results, the progressive efficiency in VSWM is related to differences in EEG patterns among children, adolescents and adults.
Highlights
Complex cognitive activities such as reasoning, language comprehension, planning, and spatial process are sus-How to cite this paper: Guevara, M.A., et al (2015) Prefrontal-Parietal Correlation during Performance of a Visuospatial Working Memory Task in Children, Adolescents and Young Adults
1) Inter-hemispheric correlation For the bilateral interhemispheric correlations (INTERr) DLPFC (F3-F4) during task execution, a higher correlation occurred in alpha-2 (F2,33 = 5.83, p ≤ 0.006, η = 0.261), beta-1 (F2,33 = 5.36, p ≤ 0.009, η = 0.245) and beta-2 (F2,33 = 7.23, p ≤ 0.002, η = 0.305) in G2 and G3 compared to G1 (Figure 2). 2) Intra-hemispheric correlation For the right intrahemispheric correlations (INTRAr) frontopolar-DLPFC (F2-F4), the study found a higher correlation in alpha-2 (F2,33 = 3.60, p ≤ 0.037, η = 0.179) in G2 compared to G1 (Figure 3(a)), while for the right INTRAr DLPFC-parietal (F4-P4) during task execution it found a higher correlation in G2 in beta-2 (F2,33 = 4.57, p ≤ 0.017, η = 0.217) compared to G1 (Figure 3(b))
2) rEEG We found a higher DLPFC-INTERr in G2 and G3 compared to G1, a fact that could explain the higher visuospatial working memory task (VSWM) capacity
Summary
Complex cognitive activities such as reasoning, language comprehension, planning, and spatial process are sus-How to cite this paper: Guevara, M.A., et al (2015) Prefrontal-Parietal Correlation during Performance of a Visuospatial Working Memory Task in Children, Adolescents and Young Adults. This is defined as interactive processes that involve temporal storage and manipulation of information which allow information to be held temporarily in an accessible state [2]. The task begins when the experimenter taps a sequence of touches on cubes placed on a board, which the participant attempts to imitate either in the same order or backwards. The latter mode assesses WM because of the reordering to generate a new order of items [10]
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