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Authors: Armin Walter 1 ; Georgios Naros 2 ; Martin Spüler 1 ; Wolfgang Rosenstiel 1 ; Alireza Gharabaghi 2 and Martin Bogdan 3

Affiliations: 1 University of Tübingen, Germany ; 2 University of Tübingen, University Hospital and University of Tübingen, Germany ; 3 University of Tübingen and Universität Leipzig, Germany

Keyword(s): Cortical Stimulation, Stroke, Electrocorticography, Evoked Activity, CCEP, Latency.

Abstract: Cortical stimulation is being investigated as a possible tool to support stroke rehabilitation. In particular the analysis of stimulation-evoked neural activity during the rehabilitation process might be helpful to gain a better understanding of the brain reorganization associated with functional recovery after stroke. In this paper, the stimulation-evoked brain activity from a patient with implanted epidural electrodes undergoing an intervention using of brain-computer interfaces combined with cortical stimulation for stroke rehabilitation has been analyzed. We identified a component of the evoked cortical activity that exhibited several characteristics that have not been described before: A significant latency decrease over the course of the rehabilitation training, a significantly smaller latency if the patient attempted to move his paralyzed hand compared to rest and a significant correlation of the latency with the spectral power of the ECoG signal. In addition to the latency, o ther parameters such as the peak amplitude of the evoked activity were tested as well, but showed a smaller effect size. We hypothesize that such “dynamic” components of the evoked activity that appear to be correlated with the rehabilitation process and the ongoing brain signal could be a target for future closed-loop stimulation systems. (More)

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Paper citation in several formats:
Walter, A.; Naros, G.; Spüler, M.; Rosenstiel, W.; Gharabaghi, A. and Bogdan, M. (2013). Dynamics of a Stimulation-evoked ECoG Potential During Stroke Rehabilitation - A Case Study. In Proceedings of the International Congress on Neurotechnology, Electronics and Informatics (NEUROTECHNIX 2013) - BrainRehab; ISBN 978-989-8565-80-8, SciTePress, pages 241-248. DOI: 10.5220/0004644302410248

@conference{brainrehab13,
author={Armin Walter. and Georgios Naros. and Martin Spüler. and Wolfgang Rosenstiel. and Alireza Gharabaghi. and Martin Bogdan.},
title={Dynamics of a Stimulation-evoked ECoG Potential During Stroke Rehabilitation - A Case Study},
booktitle={Proceedings of the International Congress on Neurotechnology, Electronics and Informatics (NEUROTECHNIX 2013) - BrainRehab},
year={2013},
pages={241-248},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004644302410248},
isbn={978-989-8565-80-8},
}

TY - CONF

JO - Proceedings of the International Congress on Neurotechnology, Electronics and Informatics (NEUROTECHNIX 2013) - BrainRehab
TI - Dynamics of a Stimulation-evoked ECoG Potential During Stroke Rehabilitation - A Case Study
SN - 978-989-8565-80-8
AU - Walter, A.
AU - Naros, G.
AU - Spüler, M.
AU - Rosenstiel, W.
AU - Gharabaghi, A.
AU - Bogdan, M.
PY - 2013
SP - 241
EP - 248
DO - 10.5220/0004644302410248
PB - SciTePress

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