N2001


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N2001

Database of clinical signals. Nikolic M, Rigshospitalet, Copenhagen, DK.

These signals were recorded and analyzed as a part of Nikolic M. Detailed Analysis of Clinical Electromyography Signals EMG Decomposition, Findings and Firing Pattern Analysis in Controls and Patients with Myopathy and Amytrophic Lateral Sclerosis. PhD Thesis, Faculty of Health Science, University of Copenhagen, 2001. <view pdf>

The material consisted of a normal control group, a group of patients with myopathy and a group of patients with ALS. The control group consisted of 10 normal subjects aged 21-37 years, 4 females and 6 males. 6 out of 10 were in very good physical shape, and the remaining except one were in general good shape. None in the control group had signs or history of neuromuscular disorders. The group with myopathy consisted of 7 patients; 2 females and 5 males aged 19-63 years. All 7 had clinical and electrophysiological signs of myopathy15. The ALS group consisted of 8 patients; 4 females and 4 males aged 35-67 years. Besides clinical and electrophysiological signs compatible with ALS, 5 of the them died within a few years after onset of the disorder, supporting the diagnosis of ALS. Data and findings for the individuals in this study are shown in Appendix A, Fig. A.1 of the thesis. The brachial biceps and medial vastus muscles where used in this study because they were the most frequently investigated in the two patient groups.

The EMG signals were recorded under usual conditions for MUAP analysis:
The recordings were made at low (just above threshold) voluntary and constant level of contraction.
Visual and audio feedback was used to monitor the signal quality.
A standard concentric needle electrode was used.
The EMG signals were recorded from five places in the muscle at three levels of insertion (deep, medium, low).
The high and low pass filters of the EMG amplifier were set at 2 Hz and 10 kHz.

* Please cite this data as:
Nikolic M. Detailed Analysis of Clinical Electromyography Signals EMG Decomposition, Findings and Firing Pattern Analysis in Controls and Patients with Myopathy and Amytrophic Lateral Sclerosis. PhD Thesis, Faculty of Health Science, University of Copenhagen, 2001. [The data are available as dataset N2001 at http://www.emglab.net]

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