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Surface electromyography: a new imaging technique| old_uid | 11397 |
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| title | Surface electromyography: a new imaging technique |
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| start_date | 2016/04/07 |
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| schedule | 13h30 |
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| online | no |
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| summary | Surface Electromyography (sEMG) is the study of the electrical signals produced by muscles and detected on the skin. The distribution of this potentials on the skin is changing very rapidly and represents the sources (action potentials) moving along the fibers of the active motor units. False colors can be used to represent these potentials (red for +, blue for -) and to obtain a movie consisting of 2000 frames/s that must be displayed in slow motion, off-line. Alternatively, local features of the signals (such as amplitude or spectral features) can be calculated every Ω s or every second, generating feature images that can be displayed in real time. These images can be obtained with High Density electrode grids and contain an enormous amount of information about the muscles behavior and control strategy of the muscle below the grid.
Extraction and interpretation of these information is a current research challenge and requires proper sampling in space and the design of suitable pasteless electrode arrays.
The current state of the art provides many applications that range from electrophysiology to rehabilitation medicine, from sport to space medicine, from occupational medicine to ergonomics, to obstetrics and games. EMG applications of some fundamental engineering concepts will be discussed. The current limitations of the technique (applicable to superficial muscles only) and possible future applications (robot control, work assistance devices) will be discussed. |
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| responsibles | Hueber |
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