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A fuzzy logic model for hand posture control using human cortical activity recorded by micro-ECoG electrodes

Vinjamuri, R and Weber, DJ and Degenhart, AD and Collinger, JL and Sudre, GP and Adelson, PD and Holder, DL and Boninger, ML and Schwartz, AB and Crammond, DJ and Tyler-Kabara, EC and Wang, W (2009) A fuzzy logic model for hand posture control using human cortical activity recorded by micro-ECoG electrodes. Proceedings of the 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society: Engineering the Future of Biomedicine, EMBC 2009. 4339 - 4342.

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Abstract

This paper presents a fuzzy logic model to decode the hand posture from electro-cortico graphic (ECoG) activity of the motor cortical areas. One subject was implanted with a micro-ECoG electrode array on the surface of the motor cortex. Neural signals were recorded from 14 electrodes on this array while Subject participated in three reach and grasp sessions. In each session, Subject reached and grasped a wooden toy hammer for five times. Optimal channels/electrodes which were active during the task were selected. Power spectral densities of optimal channels averaged over a time period of 1/2 second before the onset of the movement and 1 second after the onset of the movement were fed into a fuzzy logic model. This model decoded whether the posture of the hand is open or closed with 80% accuracy. Hand postures along the task time were decoded by using the output from the fuzzy logic model by two methods (i) velocity based decoding (ii) acceleration based decoding. The latter performed better when hand postures predicted by the model were compared to postures recorded by a data glove during the experiment. This fuzzy logic model was imported to MATLAB® SIMULINK to control a virtual hand. ©2009 IEEE.

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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Vinjamuri, R
Weber, DJdougweber@pitt.eduDJW500000-0002-9782-3497
Degenhart, AD
Collinger, JL
Sudre, GP
Adelson, PD
Holder, DL
Boninger, MLboninger@pitt.eduBONINGER
Schwartz, ABabs21@pitt.eduABS21
Crammond, DJcrammond@pitt.eduCRAMMOND
Tyler-Kabara, ECtylerk@pitt.eduTYLERK
Wang, W
Centers: Other Centers, Institutes, Offices, or Units > Human Engineering Research Laboratories
Date: 1 January 2009
Date Type: Publication
Journal or Publication Title: Proceedings of the 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society: Engineering the Future of Biomedicine, EMBC 2009
Page Range: 4339 - 4342
DOI or Unique Handle: 10.1109/iembs.2009.5332746
Schools and Programs: School of Health and Rehabilitation Sciences > Rehabilitation Science and Technology
Refereed: Yes
MeSH Headings: Adolescent; Brain Mapping--methods; Cerebral Cortex--pathology; Computer Simulation; Electroencephalography--instrumentation; Electroencephalography--methods; Equipment Design; Female; Fuzzy Logic; Hand--physiology; Humans; Microcomputers; Microelectrodes; Models, Neurological; Posture; Time Factors
PubMed ID: 19963823
Date Deposited: 18 Oct 2012 17:27
Last Modified: 02 Feb 2019 16:57
URI: http://d-scholarship-dev.library.pitt.edu/id/eprint/15955

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