Cerebral Networks and Functional Brain Asymmetry: Evidence from Regional Metabolic Changes during Word Repetition

@article{Karbe1998CerebralNA,
  title={Cerebral Networks and Functional Brain Asymmetry: Evidence from Regional Metabolic Changes during Word Repetition},
  author={Hans Karbe and Karl Herholz and Gerald Weber-Luxenburger and M. Ghaemi and W.-D. Heiss},
  journal={Brain and Language},
  year={1998},
  volume={63},
  pages={108-121}
}
Word repetition causes a significant bilateral metabolic increase in both superior temporal cortices. Frontal speech areas are less activated despite their presumable speech competence. We investigated in this study the relationship between frontal and temporal cortical areas during word repetition. We measured regional cerebral metabolic rates of glucose (CMRGI) in 15 normal subjects with positron emission tomography (PET) at rest and during word repetition. Significant correlations connected… 
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40 Citations

Collateral Inhibition of Transcallosal Activity Facilitates Functional Brain Asymmetry
  • H. Karbe, K. Herholz, M. Halber, W. Heiss
  • Biology
    Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
  • 1998
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The study indicates that language processing in asymmetrically organized cortical areas inhibits the reciprocal transcallosal information exchange in favor of the lateralized mental operation.
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