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ERIC Number: EJ830325
Record Type: Journal
Publication Date: 2009
Pages: 7
Abstractor: As Provided
Reference Count: 21
ISBN: N/A
ISSN: ISSN-0160-2896
Intelligence and Neural Efficiency: Measures of Brain Activation versus Measures of Functional Connectivity in the Brain
Neubauer, Aljoscha C.; Fink, Andreas
Intelligence, v37 n2 p223-229 Mar-Apr 2009
The neural efficiency hypothesis of intelligence suggests a more efficient use of the cortex (or even the brain) in brighter as compared to less intelligent individuals. This has been shown in a series of studies employing different neurophysiological measurement methods and a broad range of different cognitive task demands. However, most of the studies dealing with the brain-IQ relationship used parameters of absolute or relative brain activation such as the event-related (de-)synchronization of EEG alpha activity, allowing for interpretations in terms of more or less brain activation when individuals are confronted with cognitively demanding tasks. In order to investigate the neural efficiency hypothesis more thoroughly, we also used measures that inform us about functional connectivity between different brain areas (or functional coupling, respectively) when engaged in cognitive task performance. Analyses reveal evidence that higher intelligence is associated with a lower brain activation (or a lower ERD, respectively) and a stronger phase locking between short-distant regions of the frontal cortex. (Contains 2 figures and 2 tables.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A