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| Myolab from the Clinical Neurophysiology department University Nijmegen |
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The research group of Prof. Stegeman has pioneered the 128-channel SEMG method with BioSemi hardware. Please contact the University Nijmegen for prices and availability. The Myolab software consists of three packages: |
| Basic acquisition: SEMG acquisition (MyoDaq) and off-line MyoView: | |
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Electrode placement check using On-line cross correlation |
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Impedance check |
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Multiple spatial derivations |
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Open data format, C-language and Matlab routines available |
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Monopolar recording and storage |
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Patient and measurement information storage |
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Electrode matrix definition program (MyoDef) |
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No time event triggered acquisition |
| Basic analysis: Temporal and spatial analysis included in MyoView: | |
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RMS mapping |
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F10, F50, F90 frequency mapping |
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Muscle Fiber Conduction velocity |
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Automated Motor Endplate detection |
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Batch processing for large data clusters (MyoBatch) |
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Including upgrade for dedicated acquisition and View (triggering) |
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Including 1 year free software upgrades |
| Advanced analysis : Single Motor Unit (MU) analysis: | |
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MU size |
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MU topography |
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MU firing pattern |
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MFCV distribution |
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MUNE on basis CMAP topography |
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Only in combination with the basic analysis package |
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The
MyoDaq user interface is especially designed for surface electromyography
(sEMG) measurements using multiple channels on a single muscle. The
control in the upper left corner is used to select a part of the 130
channels that are recorded. The largest part of the screen is reserved
to display the selected signals. In this example 12 bipolar signals
are shown. The inset shows the impedance measurement and offers a quick overview over the grid. The MyoDaq program includes user definable spatial-filters (montages) and display facilities. The windows-like user interface is easy to operate and focuses on the signals that are recorded. |
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The
user interface offers two display modes: a normal view-mode (see above)
and a quality view-mode. The quality view-mode displays the consecutive
(bipolar or other montage) signals superimposed. This way it is easy
to see if the signals change from one electrode to the other. Furthermore,
on the right side of the graph the cross-correlation values are displayed
for all superimposed signals. High correlation values >0.7 are
required for reliable conduction velocity estimation. Checking the
acquired signals during the acquisition is crucial for good signal
quality. With this dedicated acquisition program we found it much
easier to acquire high quality sEMG. MyoDaq is programmed in C using
LabWindows/CVI® version 5.5. |
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A subject/patient database is created so data can easily be retrieved.
The database is a based on a simple text file containing the privacy
sensitive information. The privacy sensitive information is not stored
inside the data file, so it is save to export the data to colleagues
without compromising the subject's privacy. Every new subject receives
a unique ID that is used by the system to follow the subject. |
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