Sensitivity and specificity of upper extremity movements decoded from electrocorticogram

An H. Do, Po T. Wang, Christine E. King, Andrew Schombs, Jack J. Lin, Mona Sazgar, Frank P K Hsu, Susan J. Shaw, David E. Millett, Charles Y. Liu, Agnieszka A. Szymanska, Luis A. Chui, Zoran Nenadic

Research output: Contribution to journalArticle

Abstract

Electrocorticogram (ECoG)-based brain computer interfaces (BCI) can potentially be used for control of arm prostheses. Restoring independent function to BCI users with such a system will likely require control of many degrees-of-freedom (DOF). However, our ability to decode many-DOF arm movements from ECoG signals has not been thoroughly tested. To this end, we conducted a comprehensive study of the ECoG signals underlying 6 elementary upper extremity movements. Two subjects undergoing ECoG electrode grid implantation for epilepsy surgery evaluation participated in the study. For each task, their data were analyzed to design a decoding model to classify ECoG as idling or movement. The decoding models were found to be highly sensitive in detecting movement, but not specific in distinguishing between different movement types. Since sensitivity and specificity must be traded-off, these results imply that conventional ECoG grids may not provide sufficient resolution for decoding many-DOF upper extremity movements.

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Upper Extremity
Brain-Computer Interfaces
Decoding
Brain computer interface
Sensitivity and Specificity
Artificial Limbs
Prosthetics
Surgery
Epilepsy
Electrodes
Arm

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Sensitivity and specificity of upper extremity movements decoded from electrocorticogram. / Do, An H.; Wang, Po T.; King, Christine E.; Schombs, Andrew; Lin, Jack J.; Sazgar, Mona; Hsu, Frank P K; Shaw, Susan J.; Millett, David E.; Liu, Charles Y.; Szymanska, Agnieszka A.; Chui, Luis A.; Nenadic, Zoran.

In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, Vol. 2013, 2013, p. 5618-5621.

Research output: Contribution to journalArticle

Do, An H. ; Wang, Po T. ; King, Christine E. ; Schombs, Andrew ; Lin, Jack J. ; Sazgar, Mona ; Hsu, Frank P K ; Shaw, Susan J. ; Millett, David E. ; Liu, Charles Y. ; Szymanska, Agnieszka A. ; Chui, Luis A. ; Nenadic, Zoran. / Sensitivity and specificity of upper extremity movements decoded from electrocorticogram. In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference. 2013 ; Vol. 2013. pp. 5618-5621.
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