Intelligence and working memory systems: Evidence of neural efficiency in alpha band ERD

  • Grabner R
  • Fink A
  • Stipacek A
 et al. 
  • 6

    Readers

    Mendeley users who have this article in their library.
  • N/A

    Citations

    Citations of this article.

Abstract

Starting from the well-established finding that brighter individuals display a more efficient brain function when performing cognitive tasks (i.e., neural efficiency), we investigated the relationship between intelligence and cortical activation in the context of working memory (WM) tasks. Fifty-five male (n = 28) and female (n = 27) participants worked on (1) a classical forward digit span task demanding only shortterm memory (STM), (2) an attention-switching task drawing on the central executive (CE) of WM and (3) a WM task involving both STM storage and CE processes. During performance of these three types of tasks, cortical activation was quantified by the extent of Event-Related Desynchronization (ERD) in the alpha band of the human EEC. Correlational analyses revealed associations between the amount of ERD in the upper alpha band and intelligence in several brain regions. In all tasks, the males were more likely to display the negative intelligence - cortical activation relationship. Furthermore, stronger associations between ERD and intelligence were found for fluid rather than crystallized intelligence. Analyses also point to topographical differences in neural efficiency depending on sex, task type and the associated cognitive subsystems engaged during task performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved) (journal abstract)

Author-supplied keywords

  • Alpha Rhythm
  • Brain
  • Cognitive Processes
  • Short Term Memory
  • central executive
  • event-related desynchronization
  • intelligence
  • neural efficiency
  • short-term memory
  • working memory

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • R H Grabner

  • A Fink

  • A Stipacek

  • C Neuper

  • A C Neubauer

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free