{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:30:08Z","timestamp":1760243408227,"version":"build-2065373602"},"reference-count":27,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2013,2,8]],"date-time":"2013-02-08T00:00:00Z","timestamp":1360281600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this study, we developed a compact wireless Laplacian electrode module for electromyograms (EMGs). One of the advantages of the Laplacian electrode configuration is that EMGs obtained with it are expected to be sensitive to the firing of the muscle directly beneath the measurement site. The performance of the developed electrode module was investigated in two human interface applications: character-input interface and detection of finger movement during finger Braille typing. In the former application, the electrode module was combined with an EMG-mouse click converter circuit. In the latter, four electrode modules were used for detection of finger movements during finger Braille typing. Investigation on the character-input interface indicated that characters could be input stably by contraction of (a) the masseter, (b) trapezius, (c) anterior tibialis and  (d) flexor carpi ulnaris muscles. This wide applicability is desirable when the interface is applied to persons with physical disabilities because the disability differs one to another. The investigation also demonstrated that the electrode module can work properly without any skin preparation. Finger movement detection experiments showed that each finger movement was more clearly detectable when comparing to EMGs recorded with conventional electrodes, suggesting that the Laplacian electrode module is more suitable for detecting the timing of finger movement during typing. This could be because the Laplacian configuration enables us to record EMGs just beneath the electrode. These results demonstrate the advantages of the Laplacian electrode module.<\/jats:p>","DOI":"10.3390\/s130202368","type":"journal-article","created":{"date-parts":[[2013,2,8]],"date-time":"2013-02-08T11:00:45Z","timestamp":1360321245000},"page":"2368-2383","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Development of a Compact Wireless Laplacian Electrode Module for Electromyograms and Its Human Interface Applications"],"prefix":"10.3390","volume":"13","author":[{"given":"Yutaka","family":"Fukuoka","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Kogakuin University, Tokyo 163-8677, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenji","family":"Miyazawa","sequence":"additional","affiliation":[{"name":"Master's Program in Electronic and Computer Engineering, Tokyo Denki University, Saitama 350-0394, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Mori","sequence":"additional","affiliation":[{"name":"Department of Electrical and Electronic Engineering, Utsunomiya University, Tochigi 321-8585, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manabi","family":"Miyagi","sequence":"additional","affiliation":[{"name":"Research and Support Center on Higher Education for the Hearing Impaired and Visually Impaired, Tsukuba University of Technology, Ibaraki 305-8521, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masafumi","family":"Nishida","sequence":"additional","affiliation":[{"name":"Department of Information Systems Design, Doshisha University, Kyoto 610-0321, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasuo","family":"Horiuchi","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Ichikawa","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Hoshino","sequence":"additional","affiliation":[{"name":"School of Science and Engineering, Tokyo Denki University, Saitama 350-0394, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Makoto","family":"Noshiro","sequence":"additional","affiliation":[{"name":"Department of Clinical Engineering, School of Allied Health Sciences, Kitasato University, Kanagawa 228-8555, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akinori","family":"Ueno","sequence":"additional","affiliation":[{"name":"Department of Electrical and Electronic Engineering, Tokyo Denki University, Tokyo 120-8551, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2013,2,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"989","DOI":"10.1007\/11788713_144","article-title":"People with motor and mobility impairment: Innovative multimodal interfaces to wheelchairs","volume":"4061","author":"Holzinger","year":"2006","journal-title":"Lect. Notes Comput. Sci."},{"key":"ref_2","unstructured":"Kempter, G., and Hellberg, P.V. (2006). Informationen Nutzbar Machen, Papst Science Publishers."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"999","DOI":"10.1007\/11788713_146","article-title":"MediaWheelie: a best practice example for Research in multimodal user interfaces (MUIs)","volume":"4061","author":"Nischelwitzer","year":"2006","journal-title":"Lect. Notes Comput. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2324","DOI":"10.3390\/e14112324","article-title":"On using entropy for enhancing handwriting preprocessing","volume":"11","author":"Holzinger","year":"2012","journal-title":"Entropy"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"99","DOI":"10.1109\/MPRV.2004.1269140","article-title":"Biosignals offer potential for direct interfaces and health monitoring","volume":"3","author":"Stanford","year":"2004","journal-title":"IEEE Pervasive Comput. Mag."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"538","DOI":"10.1109\/TAC.1978.1101783","article-title":"A microprocessor system for multifunctional control of upper-limb prostheses via myoelectric signal identification","volume":"AC-23","author":"Graupe","year":"1978","journal-title":"IEEE Trans. Automat. Contr."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1109\/TBME.1982.325033","article-title":"Development of the Utah artificial arm","volume":"BME-29","author":"Jacobson","year":"1982","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1048","DOI":"10.1109\/10.464381","article-title":"Adaptive filtering of the electromyographic signal for prosthetic control and force estimation","volume":"42","author":"Park","year":"1995","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"290","DOI":"10.1109\/TNSRE.2002.806831","article-title":"Classification of finger activation for use in a robotic prosthesis arm","volume":"10","author":"Peleg","year":"2002","journal-title":"IEEE Trans. Neural Syst. Rehab. Eng."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"775","DOI":"10.1109\/70.538982","article-title":"Myoelectric teleoperation of a complex robotic hand","volume":"12","author":"Farry","year":"1996","journal-title":"IEEE Trans. Robotics Autom."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"210","DOI":"10.1109\/TRA.2003.808873","article-title":"A human-assisting manipulator teleoperated by EMG Signals and arm motions","volume":"19","author":"Fukuda","year":"2003","journal-title":"IEEE Trans. Robotics. Autom."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"173","DOI":"10.20965\/jrm.2005.p0173","article-title":"Wearable pointing device using EMG signals","volume":"17","author":"Ogino","year":"2005","journal-title":"J. Robot. Mechatron."},{"key":"ref_13","first-page":"1312","article-title":"Dialogue languages and persons with disabilities","volume":"E87-D","author":"Ichikawa","year":"2004","journal-title":"IEICE Trans. Inf. Syst."},{"key":"ref_14","unstructured":"Miyagi, M., Nishida, M., Horiuchi, Y., and Ichikawa, A. (2005, January 24\u201326). Conference System Using Finger Braille. Sasukatchewan, Canada."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Ueno, A., Uchikawa, Y., and Noshiro, M. (2007, January 22\u201326). A Capacitive Sensor System for Measuring Laplacian Electromyogram through Cloth: A Pilot Study. Lyon, France.","DOI":"10.1109\/IEMBS.2007.4353648"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"526","DOI":"10.1016\/0013-4694(75)90056-5","article-title":"An on-line transformation of EEG scalp potentials into orthogonal source derivations","volume":"39","author":"Hjorth","year":"1975","journal-title":"Electroenceph. Clin. Neurophysiol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1109\/TBME.1987.326034","article-title":"Spatial filtering of noninvasive multielectrode EMG. I. Introduction to measuring technique and applications","volume":"34","author":"Reucher","year":"1987","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"106","DOI":"10.1109\/TBME.1987.326035","article-title":"Spatial filtering of noninvasive multielectrode EMG. II. Filter performance in theory and modeling","volume":"34","author":"Reucher","year":"1987","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1179","DOI":"10.1109\/10.168684","article-title":"Body surface Laplacian ECG mapping","volume":"39","author":"He","year":"1992","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1109\/51.620505","article-title":"Principles and applications of the Laplacian electrocardiogram","volume":"16","author":"He","year":"1997","journal-title":"IEEE Eng. Med. Biol. Mag."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"475","DOI":"10.1615\/CritRevBiomedEng.v23.i5-6.30","article-title":"Body surface Laplacian electrocardiographic mapping\u2014A review","volume":"23","author":"He","year":"1995","journal-title":"Clin. Rev. Biomed. Eng."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"696","DOI":"10.1016\/0013-4694(83)90040-8","article-title":"On-line source-density computation with a minimum of electrodes","volume":"56","author":"MacKay","year":"1983","journal-title":"Electroencephalogr. Clin. Neurophysiol."},{"key":"ref_23","first-page":"471","article-title":"Robust n-gram model of Japanese character and its application to document recognition","volume":"E79-D","author":"Mori","year":"1997","journal-title":"IEICE Trans. Inf. Syst."},{"key":"ref_24","first-page":"135","article-title":"A fast scanning input method based on multiple cursors","volume":"5","author":"Mori","year":"2003","journal-title":"Trans. Human Interface Soc."},{"key":"ref_25","unstructured":"Grzesiak, R.C., and Ciccone, D.S. (1994). Psychological Vulnerability to Chronic Pain, Springer."},{"key":"ref_26","first-page":"17","article-title":"Repetitive strain injury and electromyography: Applications in physical therapy","volume":"5","author":"Pepper","year":"1994","journal-title":"Phys. Ther. Prod."},{"key":"ref_27","first-page":"379","article-title":"Development of finger Braille teaching system Teaching of dotting finger and position using speech recognition","volume":"7","author":"Matsuda","year":"2005","journal-title":"Trans. Human Interface Soc."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/2\/2368\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:44:55Z","timestamp":1760219095000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/2\/2368"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,2,8]]},"references-count":27,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2013,2]]}},"alternative-id":["s130202368"],"URL":"https:\/\/doi.org\/10.3390\/s130202368","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2013,2,8]]}}}