Eeg activity during the spatial span task in young men: differences between short-term and working memory.

EEG ACTIVITY DURING THE SPATIAL SPAN TASK IN YOUNG MEN: DIFFERENCES BETWEEN SHORT-TERM AND WORKING MEMORY. Brain Res. 2018 Feb 06;: Authors: Guevara MA, Paniagua EIC, González MH, Carrillo IKS, Sepúlveda MLA, Orozco JCH, Gutiérrez CA Abstract Short-term memory and working memory are two closely-related concepts that involve the prefrontal and parietal areas. These two types of memory have been evaluated by means of the spatial span task in its forward and backward conditions, respectively. To determine possible neurofunctional differences between them, this study recorded electroencephalographic activity (EEG) in the frontopolar (Fp1, Fp2), dorsolateral (F3, F4), and parietal (P3 and P4) areas during performance of the forward and backward conditions of this task in young men. The backward condition (an indicator of working memory) was characterized by fewer correct answers, higher absolute power (AP) of the delta band in dorsolateral areas, and a lower correlation between frontopolar and dorsolateral regions in the fast bands (alpha, beta and gamma), mainly in the right hemisphere. The prefrontal EEG changes during backward performance may be associated with the higher attentional demands and inhibition processes required to invert the order of reproduction of a sequence. These data provide evidence that the forward and backward conditions of the spatial span task can be distinguished on the basis of neurofunctional activity and ...
Source: Brain Research - Category: Neurology Authors: Tags: Brain Res Source Type: research