Post-stroke injured cerebral cortex: frequency analysis of the desynchronization of its sensorimotor rhythms during motor intent

Carolina B. Tabernig, Lucia C. Carrere, Gerardo G. Gentiletti, Erika G. Spaich

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

During a motor intent, desynchronization of sensorimotor rhythms of the cerebral cortex takes place. This physiological phenomenon, called event related desynchronization (ERD), is used for the development of Brain Computer Interfaces (BCI) for motor recovery. Stroke survivors suffering complete or partial loss of mobility usually require therapy for motor rehabilitation. The damage of the sensorimotor cortex that follows a stroke can compromise the brain rhythms that encode motor states. Therefore, this study assessed the ERD behavior during movement and motor intent in post-stroke patients. Eight electroencephalogram channels were recorded in seven chronic ischemic stroke patients during rest and movement or motor intent of their hands. The spectra of the coefficient of determination r2 were estimated between 8 and 30 Hz. The median of r2 reached 0.05 during motor intent of the corresponding affected hand; so it is a real value to be taken into account in BCI developments for people who have suffered a stroke. However, there was no evidence of a common pattern for the ERD. It was also observed that stroke survivors have discrimination capacity in the injured hemisphere during the motor intent of their affected limb.

Original languageEnglish
Title of host publication8th Latin American Conference on Biomedical Engineering and 42nd National Conference on Biomedical Engineering - Proceedings of CLAIB-CNIB 2019 : VIII Latin American Conference on Biomedical Engineering and XLII National Conference on Biomedical Engineering
EditorsCésar A. González Díaz, Christian Chapa González, Eric Laciar Leber, Hugo A. Vélez, Norma P. Puente, Dora-Luz Flores, Adriano O. Andrade, Héctor A. Galván, Fabiola Martínez, Renato García, Citlalli J. Trujillo, Aldo R. Mejía
Number of pages6
Place of PublicationCancún, México
PublisherSpringer
Publication date2 Oct 2019
Pages1073-1078
ISBN (Print)978-3-030-30647-2
ISBN (Electronic)978-3-030-30648-9
DOIs
Publication statusPublished - 2 Oct 2019
EventLatin American Congress on Biomedical Engineering, CLAIB: Congreso Latinoamericano de Ingeniería Biomédica - Cancún, Mexico
Duration: 2 Oct 20195 Oct 2019
Conference number: VIII

Conference

ConferenceLatin American Congress on Biomedical Engineering, CLAIB
NumberVIII
CountryMexico
CityCancún
Period02/10/201905/10/2019
SeriesInternational Federation for Medical and Biological Engineering Proceedings
Volume75
ISSN1680-0737

Keywords

  • Brain Computer Interfaces
  • Event related desynchronization
  • Motor intent
  • Stroke

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