Alterations of EEG rhythms during motor preparation following awake brain surgery

Abstract : Slow-growing, infiltrative brain tumours may modify the electrophysiological balance between the two hemispheres. To determine whether and how asymmetry of EEG rhythms during motor preparation might occur following " awake brain surgery " for this type of tumour, we recorded electroencephalograms during a simple visuo-manual reaction time paradigm performed by the patients between 3 and 12 months after surgery and compared them to a control group of 8 healthy subjects. Frequency analyses revealed imbalances between the injured and healthy hemispheres. More particularly, we observed a power increase in the δ frequency band near the lesion site and a power increase in the α and β frequency bands. Interestingly, these alterations seem to decrease for the two patients whose surgery were anterior to 9 months, independently of the size of the lesion. Reaction times did not reflect this pattern as they were clearly not inversely related to the anteriority of the surgery. Electrophysiology suggests here different processes of recovery compared to behavioral data and brings further insights for the understanding of EEG rhythms that should not be systematically confounded or assimilated with cognitive performances. EEG monitoring is rare for these patients, especially after awake brain surgery, however it is important.
Document type :
Journal articles
Liste complète des métadonnées

Cited literature [51 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01813291
Contributor : Anthony Boyer <>
Submitted on : Tuesday, June 12, 2018 - 12:06:52 PM
Last modification on : Thursday, April 4, 2019 - 10:18:05 AM
Document(s) archivé(s) le : Thursday, September 13, 2018 - 2:19:18 PM

Identifiers

Citation

Anthony Boyer, Sofiane Ramdani, Hugues Duffau, Bénédicte Poulin-Charronnat, David Guiraud, et al.. Alterations of EEG rhythms during motor preparation following awake brain surgery. Brain and Cognition, Elsevier, 2018, 125, pp.45-52. ⟨https://www.sciencedirect.com/science/article/pii/S0278262618301234?via%3Dihub⟩. ⟨10.1016/j.bandc.2018.05.010⟩. ⟨hal-01813291⟩

Share

Metrics

Record views

525

Files downloads

134