TY - GEN
T1 - Influence of spontaneous rhythm on movement-related cortical potential
T2 - 11th International Conference on Augmented Cognition, AC 2017, held as part of the 19th International Conference on Human-Computer Interaction, HCI 2017
AU - Yao, Lin
AU - Chen, Mei Lin
AU - Sheng, Xinjun
AU - Mrachacz-Kersting, Natalie
AU - Zhu, Xiangyang
AU - Farina, Dario
AU - Jiang, Ning
PY - 2017
Y1 - 2017
N2 - We have recently developed an associative Brain-Computer Interface (BCI) for neuromodulation in chronic and acute stroke patients that leads to functional improvements. The control signal is the movement related cortical potential (MRCP) that develops prior to movement execution. The MRCP increases in variability as a novel task is learned, which in turn significantly decreases the detection accuracy. In the current study we sought to investigate if tactile stimulation, often implemented in rehabilitation, may act as a primer to our associative BCI by decreasing MRCP variability. Six chronic stroke patients were exposed to one session of tactile stimulation, and the MRCP of an arm lifting task, repeated 30 times, extracted. Results reveal that for three patients the MRCP detection accuracy expressed as the rate of true and false positives was improved. In two patients however the detection accuracy declined while one patient was unable to complete the experiment. Since tactile stimulation is a common tool implemented by physiotherapists to train patients to perform dynamic movements with the appropriate muscle pattern to avoid compensatory actions by other muscles it will be important to decipher why it results in such differential effects across patients.
AB - We have recently developed an associative Brain-Computer Interface (BCI) for neuromodulation in chronic and acute stroke patients that leads to functional improvements. The control signal is the movement related cortical potential (MRCP) that develops prior to movement execution. The MRCP increases in variability as a novel task is learned, which in turn significantly decreases the detection accuracy. In the current study we sought to investigate if tactile stimulation, often implemented in rehabilitation, may act as a primer to our associative BCI by decreasing MRCP variability. Six chronic stroke patients were exposed to one session of tactile stimulation, and the MRCP of an arm lifting task, repeated 30 times, extracted. Results reveal that for three patients the MRCP detection accuracy expressed as the rate of true and false positives was improved. In two patients however the detection accuracy declined while one patient was unable to complete the experiment. Since tactile stimulation is a common tool implemented by physiotherapists to train patients to perform dynamic movements with the appropriate muscle pattern to avoid compensatory actions by other muscles it will be important to decipher why it results in such differential effects across patients.
KW - Brain-computer-interface
KW - Detection accuracy
KW - Movement-related-cortical potential
KW - Stroke
KW - Tactile stimulation training
U2 - 10.1007/978-3-319-58628-1_8
DO - 10.1007/978-3-319-58628-1_8
M3 - Article in proceeding
SN - 978-3-319-58627-4
T3 - Lecture Notes in Artificial Intelligence : Subseries of Lecture Notes in Computer Science
SP - 90
EP - 98
BT - Augmented Cognition. Neurocognition and Machine Learning
PB - Springer
Y2 - 9 July 2017 through 14 July 2017
ER -