Document Detail

Synchronized brain activity and neurocognitive function in patients with low-grade glioma: a magnetoencephalography study.
MedLine Citation:
PMID:  18650489     Owner:  NLM     Status:  MEDLINE    
We investigated the mechanisms underlying neurocognitive dysfunction in patients with low-grade glioma (LGG) by relating functional connectivity revealed by magnetoencephalography to neurocognitive function. We administered a battery of standardized neurocognitive tests measuring six neurocognitive domains to a group of 17 LGG patients and 17 healthy controls, matched for age, sex, and educational level. Magnetoencephalography recordings were conducted during an eyes-closed "resting state," and synchronization likelihood (a measure of statistical correlation between signals) was computed from the delta to gamma frequency bands to assess functional connectivity between different brain areas. We found that, compared with healthy controls, LGG patients performed more poorly in psychomotor function, attention, information processing, and working memory. LGG patients also had significantly higher long-distance synchronization scores in the delta, theta, and lower gamma frequency bands than did controls. In contrast, patients displayed a decline in synchronization likelihood in the lower alpha frequency band. Within the delta, theta, and lower and upper gamma bands, increasing short- and long-distance connectivity was associated with poorer neurocognitive functioning. In summary, LGG patients showed a complex overall pattern of differences in functional resting-state connectivity compared with healthy controls. The significant correlations between neurocognitive performance and functional connectivity in various frequencies and across multiple brain areas suggest that the observed neurocognitive deficits in these patients can possibly be attributed to differences in functional connectivity due to tumor and/or treatment.
Ingeborg Bosma; Linda Douw; Fabrice Bartolomei; Jan J Heimans; Bob W van Dijk; Tjeerd J Postma; Cornelis J Stam; Jaap C Reijneveld; Martin Klein
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-07-23
Journal Detail:
Title:  Neuro-oncology     Volume:  10     ISSN:  1522-8517     ISO Abbreviation:  Neuro-oncology     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-10-15     Completed Date:  2008-11-18     Revised Date:  2013-06-05    
Medline Journal Info:
Nlm Unique ID:  100887420     Medline TA:  Neuro Oncol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  734-44     Citation Subset:  IM    
Department of Neurology, VU University Medical Center, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands.
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MeSH Terms
Brain Neoplasms / complications,  physiopathology*
Cognition Disorders / etiology,  physiopathology*
Cortical Synchronization
Glioma / complications,  physiopathology*

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