Prognostic relevance of quantitative topographical EEG in patients with 
poststroke aphasia

Szelies, Brigitte; Mielke, Rüdiger; Kessler, Josef; Heiss, Wolf-Dieter

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Prognostic relevance of quantitative topographical EEG in patients with poststroke aphasia

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Kessler, Josef
Klinisches PET, Neurologische Abteilung, Max-Planck-Institut für neurologische Forschung, Managing Director: D. Yves von Cramon, Max Planck Institute for Metabolism Research, Managing Director: Jens Brüning, Max Planck Society;

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Heiss, Wolf-Dieter
Wolf-Dieter Heiss, Emeriti, Max Planck Institute for Metabolism Research, Managing Director: Jens Brüning, Max Planck Society;

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Citation

Szelies, B., Mielke, R., Kessler, J., & Heiss, W.-D. (2002). Prognostic relevance of quantitative topographical EEG in patients with poststroke aphasia. Brain and Language, 82(1), 87-94.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0026-D87D-2

Abstract

In this prospective study we analyzed the prognostic value of topographical quantitative EEG (qEEG) in poststroke aphasia. Twenty-three right-handed patients (ages 56 12 years) with different types of aphasia were studied. Quantitative EEG under resting conditions and an aphasia test battery were applied twice, 2 and 8 weeks after a stroke. EEG power fast Fourier transform was performed for delta (2-3.5 Hz), theta (4-7.5 Hz), alpha (8-13 Hz), and beta (13.5-20 Hz) frequency bands. EEG abnormalities within and outside speech relevant areas are related to restitution of poststroke aphasia. In the ischemic regions they indicate local disturbances; outside they reflect failures in neuronal networks involved in the generation and propagation of the alpha rhythm.