Evaluation of cortical connectivity during real and imagined rhythmic finger tapping

Maria L. Stavrinou, Liviu Moraru, Laura Cimponeriu, Stefania Della Penna, Anastasios Bezerianos

Research output: Contribution to journalArticle

Abstract

Accumulating evidence suggests the existence of a shared neural substrate between imagined and executed movements. However, a better understanding of the mechanisms involved in the motor execution and motor imagery requires knowledge of the way the co-activated brain regions interact to each other during the particular (real or imagined) motor task. Within this general framework, the aim of the present study is to investigate the cortical activation and connectivity sub-serving real and imaginary rhythmic finger tapping, from the analysis of multi-channel electroencephalogram (EEG) scalp recordings. A sequence of 250 auditory pacing stimuli has been used for both the real and imagined right finger tapping task, with a constant inter-stimulus interval of 1.5 s length. During the motor execution, healthy subjects were asked to tap in synchrony with the regular sequence of stimulus events, whereas in the imagery condition subjects imagined themselves tapping in time with the auditory cue. To improve the spatial resolution of the scalp fields and suppress unwanted interferences, the EEG data have been spatially filtered. Further, event related synchronization and desynchronization phenomena and phase synchronization analysis have been employed for the study of functionally active brain areas and their connectivity during real and imagery finger tapping. Our results show a fronto-parietal co-activation during both real and imagined movements and similar connectivity patterns among contralateral brain areas. The results support the hypothesis that functional connectivity over the contralateral hemisphere during finger tapping is preserved in imagery. The approach and results can be regarded as indicative evidences of a new strategy for recognizing imagined movements in EEG-based brain computer interface research.

Original languageEnglish (US)
Pages (from-to)137-145
Number of pages9
JournalBrain Topography
Volume19
Issue number3
DOIs
StatePublished - Mar 2007
Externally publishedYes

Fingerprint

Imagery (Psychotherapy)
Fingers
Electroencephalography
Scalp
Brain
Brain-Computer Interfaces
Cues
Healthy Volunteers
Research

Keywords

  • Beta range activity
  • Brain-Computer Interface
  • EEG
  • Event Related Synchronization (ERS) - Desynchronization (ERD)
  • Finger tapping
  • Functional connectivity
  • Imagery
  • Wavelet

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Cite this

Stavrinou, M. L., Moraru, L., Cimponeriu, L., Della Penna, S., & Bezerianos, A. (2007). Evaluation of cortical connectivity during real and imagined rhythmic finger tapping. Brain Topography, 19(3), 137-145. https://doi.org/10.1007/s10548-007-0020-7

Evaluation of cortical connectivity during real and imagined rhythmic finger tapping. / Stavrinou, Maria L.; Moraru, Liviu; Cimponeriu, Laura; Della Penna, Stefania; Bezerianos, Anastasios.

In: Brain Topography, Vol. 19, No. 3, 03.2007, p. 137-145.

Research output: Contribution to journalArticle

Stavrinou, ML, Moraru, L, Cimponeriu, L, Della Penna, S & Bezerianos, A 2007, 'Evaluation of cortical connectivity during real and imagined rhythmic finger tapping', Brain Topography, vol. 19, no. 3, pp. 137-145. https://doi.org/10.1007/s10548-007-0020-7
Stavrinou ML, Moraru L, Cimponeriu L, Della Penna S, Bezerianos A. Evaluation of cortical connectivity during real and imagined rhythmic finger tapping. Brain Topography. 2007 Mar;19(3):137-145. https://doi.org/10.1007/s10548-007-0020-7
Stavrinou, Maria L. ; Moraru, Liviu ; Cimponeriu, Laura ; Della Penna, Stefania ; Bezerianos, Anastasios. / Evaluation of cortical connectivity during real and imagined rhythmic finger tapping. In: Brain Topography. 2007 ; Vol. 19, No. 3. pp. 137-145.
@article{5eee9ecf18b9453784e2c888762d9a04,
title = "Evaluation of cortical connectivity during real and imagined rhythmic finger tapping",
abstract = "Accumulating evidence suggests the existence of a shared neural substrate between imagined and executed movements. However, a better understanding of the mechanisms involved in the motor execution and motor imagery requires knowledge of the way the co-activated brain regions interact to each other during the particular (real or imagined) motor task. Within this general framework, the aim of the present study is to investigate the cortical activation and connectivity sub-serving real and imaginary rhythmic finger tapping, from the analysis of multi-channel electroencephalogram (EEG) scalp recordings. A sequence of 250 auditory pacing stimuli has been used for both the real and imagined right finger tapping task, with a constant inter-stimulus interval of 1.5 s length. During the motor execution, healthy subjects were asked to tap in synchrony with the regular sequence of stimulus events, whereas in the imagery condition subjects imagined themselves tapping in time with the auditory cue. To improve the spatial resolution of the scalp fields and suppress unwanted interferences, the EEG data have been spatially filtered. Further, event related synchronization and desynchronization phenomena and phase synchronization analysis have been employed for the study of functionally active brain areas and their connectivity during real and imagery finger tapping. Our results show a fronto-parietal co-activation during both real and imagined movements and similar connectivity patterns among contralateral brain areas. The results support the hypothesis that functional connectivity over the contralateral hemisphere during finger tapping is preserved in imagery. The approach and results can be regarded as indicative evidences of a new strategy for recognizing imagined movements in EEG-based brain computer interface research.",
keywords = "Beta range activity, Brain-Computer Interface, EEG, Event Related Synchronization (ERS) - Desynchronization (ERD), Finger tapping, Functional connectivity, Imagery, Wavelet",
author = "Stavrinou, {Maria L.} and Liviu Moraru and Laura Cimponeriu and {Della Penna}, Stefania and Anastasios Bezerianos",
year = "2007",
month = "3",
doi = "10.1007/s10548-007-0020-7",
language = "English (US)",
volume = "19",
pages = "137--145",
journal = "Brain Topography",
issn = "0896-0267",
publisher = "Kluwer Academic/Human Sciences Press Inc.",
number = "3",

}

TY - JOUR

T1 - Evaluation of cortical connectivity during real and imagined rhythmic finger tapping

AU - Stavrinou, Maria L.

AU - Moraru, Liviu

AU - Cimponeriu, Laura

AU - Della Penna, Stefania

AU - Bezerianos, Anastasios

PY - 2007/3

Y1 - 2007/3

N2 - Accumulating evidence suggests the existence of a shared neural substrate between imagined and executed movements. However, a better understanding of the mechanisms involved in the motor execution and motor imagery requires knowledge of the way the co-activated brain regions interact to each other during the particular (real or imagined) motor task. Within this general framework, the aim of the present study is to investigate the cortical activation and connectivity sub-serving real and imaginary rhythmic finger tapping, from the analysis of multi-channel electroencephalogram (EEG) scalp recordings. A sequence of 250 auditory pacing stimuli has been used for both the real and imagined right finger tapping task, with a constant inter-stimulus interval of 1.5 s length. During the motor execution, healthy subjects were asked to tap in synchrony with the regular sequence of stimulus events, whereas in the imagery condition subjects imagined themselves tapping in time with the auditory cue. To improve the spatial resolution of the scalp fields and suppress unwanted interferences, the EEG data have been spatially filtered. Further, event related synchronization and desynchronization phenomena and phase synchronization analysis have been employed for the study of functionally active brain areas and their connectivity during real and imagery finger tapping. Our results show a fronto-parietal co-activation during both real and imagined movements and similar connectivity patterns among contralateral brain areas. The results support the hypothesis that functional connectivity over the contralateral hemisphere during finger tapping is preserved in imagery. The approach and results can be regarded as indicative evidences of a new strategy for recognizing imagined movements in EEG-based brain computer interface research.

AB - Accumulating evidence suggests the existence of a shared neural substrate between imagined and executed movements. However, a better understanding of the mechanisms involved in the motor execution and motor imagery requires knowledge of the way the co-activated brain regions interact to each other during the particular (real or imagined) motor task. Within this general framework, the aim of the present study is to investigate the cortical activation and connectivity sub-serving real and imaginary rhythmic finger tapping, from the analysis of multi-channel electroencephalogram (EEG) scalp recordings. A sequence of 250 auditory pacing stimuli has been used for both the real and imagined right finger tapping task, with a constant inter-stimulus interval of 1.5 s length. During the motor execution, healthy subjects were asked to tap in synchrony with the regular sequence of stimulus events, whereas in the imagery condition subjects imagined themselves tapping in time with the auditory cue. To improve the spatial resolution of the scalp fields and suppress unwanted interferences, the EEG data have been spatially filtered. Further, event related synchronization and desynchronization phenomena and phase synchronization analysis have been employed for the study of functionally active brain areas and their connectivity during real and imagery finger tapping. Our results show a fronto-parietal co-activation during both real and imagined movements and similar connectivity patterns among contralateral brain areas. The results support the hypothesis that functional connectivity over the contralateral hemisphere during finger tapping is preserved in imagery. The approach and results can be regarded as indicative evidences of a new strategy for recognizing imagined movements in EEG-based brain computer interface research.

KW - Beta range activity

KW - Brain-Computer Interface

KW - EEG

KW - Event Related Synchronization (ERS) - Desynchronization (ERD)

KW - Finger tapping

KW - Functional connectivity

KW - Imagery

KW - Wavelet

UR - http://www.scopus.com/inward/record.url?scp=34447549227&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447549227&partnerID=8YFLogxK

U2 - 10.1007/s10548-007-0020-7

DO - 10.1007/s10548-007-0020-7

M3 - Article

C2 - 17587169

AN - SCOPUS:34447549227

VL - 19

SP - 137

EP - 145

JO - Brain Topography

JF - Brain Topography

SN - 0896-0267

IS - 3

ER -