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    Classification of intended phoneme production from chronic intracortical microelectrode recordings in speech-motor cortex

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    BrumbergJ_FiN_5(2011).pdf (968.8Kb)
    Issue Date
    2011-05-12
    Author
    Brumberg, Jonathan S.
    Wright, E. Joseph
    Andreasen, Dinal S.
    Guenther, Frank H.
    Kennedy, Philip R.
    Publisher
    Frontiers
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We conducted a neurophysiological study of attempted speech production in a paralyzed human volunteer using chronic microelectrode recordings. The volunteer suffers from locked-in syndrome leaving him in a state of near-total paralysis, though he maintains good cognition and sensation. In this study, we investigated the feasibility of supervised classification techniques for prediction of intended phoneme production in the absence of any overt movements including speech. Such classification or decoding ability has the potential to greatly improve the quality-of-life of many people who are otherwise unable to speak by providing a direct communicative link to the general community. We examined the performance of three classifiers on a multi-class discrimination problem in which the items were 38 American English phonemes including monophthong and diphthong vowels and consonants. The three classifiers differed in performance, but averaged between 16 and 21% overall accuracy (chance-level is 1/38 or 2.6%). Further, the distribution of phonemes classified statistically above chance was non-uniform though 20 of 38 phonemes were classified with statistical significance for all three classifiers. These preliminary results suggest supervised classification techniques are capable of performing large scale multi-class discrimination for attempted speech production and may provide the basis for future communication prostheses.
    Description
    This is the published version, also available here: http://dx.doi.org/10.3389/fnins.2011.00065.
    URI
    http://hdl.handle.net/1808/17393
    DOI
    https://doi.org/10.3389/fnins.2011.00065
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    • Speech-Language-Hearing Scholarly Works [82]
    Citation
    Brumberg JS, Wright EJ, Andreasen DS, Guenther FH, and Kennedy PR (2011) Classification of intended phoneme production from chronic intracortical microelectrode recordings in speech-motor cortex. Front. Neurosci. 5:65. http://dx.doi.org/10.3389/fnins.2011.00065.

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    KU Libraries
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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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