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Open Access 01-05-2008 | clinical-patient Studies

The influence of low-grade glioma on resting state oscillatory brain activity: a magnetoencephalography study

Authors: I. Bosma, C. J. Stam, L. Douw, F. Bartolomei, J. J. Heimans, B. W. van Dijk, T. J. Postma, M. Klein, J. C. Reijneveld

Published in: Journal of Neuro-Oncology | Issue 1/2008

Abstract

Purpose In the present MEG-study, power spectral analysis of oscillatory brain activity was used to compare resting state brain activity in both low-grade glioma (LGG) patients and healthy controls. We hypothesized that LGG patients show local as well as diffuse slowing of resting state brain activity compared to healthy controls and that particularly global slowing correlates with neurocognitive dysfunction. Patient and methods Resting state MEG recordings were obtained from 17 LGG patients and 17 age-, sex-, and education-matched healthy controls. Relative spectral power was calculated in the delta, theta, upper and lower alpha, beta, and gamma frequency band. A battery of standardized neurocognitive tests measuring 6 neurocognitive domains was administered. Results LGG patients showed a slowing of the resting state brain activity when compared to healthy controls. Decrease in relative power was mainly found in the gamma frequency band in the bilateral frontocentral MEG regions, whereas an increase in relative power was found in the theta frequency band in the left parietal region. An increase of the relative power in the theta and lower alpha band correlated with impaired executive functioning, information processing, and working memory. Conclusion LGG patients are characterized by global slowing of their resting state brain activity and this slowing phenomenon correlates with the observed neurocognitive deficits.

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Title: The influence of low-grade glioma on resting state oscillatory brain activity: a magnetoencephalography study
Authors: I. Bosma
C. J. Stam
L. Douw
F. Bartolomei
J. J. Heimans
B. W. van Dijk
T. J. Postma
M. Klein
J. C. Reijneveld
Publication date: 01-05-2008
Publisher: Springer US
Published in: Journal of Neuro-Oncology / Issue 1/2008
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI: https://doi.org/10.1007/s11060-008-9535-3

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The influence of low-grade glioma on resting state oscillatory brain activity: a magnetoencephalography study

Abstract

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