Core networks for visual-concrete and abstract thought content: a brain electric microstate analysis

Lehmann, Dietrich; Pascual-Marqui, Roberto D.; Strik, Werner K.; König, Thomas (2010). Core networks for visual-concrete and abstract thought content: a brain electric microstate analysis. NeuroImage, 49(1), pp. 1073-1079. San Diego, Calif.: Elsevier 10.1016/j.neuroimage.2009.07.054

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Commonality of activation of spontaneously forming and stimulus-induced mental representations is an often made but rarely tested assumption in neuroscience. In a conjunction analysis of two earlier studies, brain electric activity during visual-concrete and abstract thoughts was studied. The conditions were: in study 1, spontaneous stimulus-independent thinking (post-hoc, visual imagery or abstract thought were identified); in study 2, reading of single nouns ranking high or low on a visual imagery scale. In both studies, subjects' tasks were similar: when prompted, they had to recall the last thought (study 1) or the last word (study 2). In both studies, subjects had no instruction to classify or to visually imagine their thoughts, and accordingly were not aware of the studies' aim. Brain electric data were analyzed into functional topographic brain images (using LORETA) of the last microstate before the prompt (study 1) and of the word-type discriminating event-related microstate after word onset (study 2). Conjunction analysis across the two studies yielded commonality of activation of core networks for abstract thought content in left anterior superior regions, and for visual-concrete thought content in right temporal-posterior inferior regions. The results suggest that two different core networks are automatedly activated when abstract or visual-concrete information, respectively, enters working memory, without a subject task or instruction about the two classes of information, and regardless of internal or external origin, and of input modality. These core machineries of working memory thus are invariant to source or modality of input when treating the two types of information.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Psychiatric Neurophysiology (discontinued)
04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Management

UniBE Contributor:

Strik, Werner and König, Thomas

ISSN:

1053-8119

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:13

Last Modified:

11 Feb 2015 09:41

Publisher DOI:

10.1016/j.neuroimage.2009.07.054

PubMed ID:

19646538

Web of Science ID:

000272031700108

BORIS DOI:

10.7892/boris.2997

URI:

https://boris.unibe.ch/id/eprint/2997 (FactScience: 206100)

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