Multi-channel fine wire, isometric contraction. McGill KC, VA RR&D Ctr, Palo Alto, US.

Multi-channel EMG signals from the brachioradialis muscles of three normal subjects that were used to validate the Montreal Algorithm in Florestal JR, Mathieu PA, and McGill KC. Automatic decomposition of multi-channel intramuscular EMG signals, in review. The signals were recorded simultaneously from three or four pairs of fine wire electrodes and a needle electrode inserted at different locations along the proximodistal axis of the muscle during 20-s-long low-level isometric contractions. The electrodes were inserted to approximately the same depth to try to record from the same population of MUs. The lengths of the recording surfaces were about 0.5 mm for both the wire and needle electrodes. The recording surfaces of the wires in each pair were separated by about 2 mm, and the pairs were separated from each other, and from the needle, by distances ranging from 10 to 100 mm. The signals were recorded in a monopolar fashion with respect to a surface electrode over the muscle belly, resulting in a total of 6 to 8 signals per contraction. Several contractions were recorded per subject, with the wire electrodes remaining in place and the needle electrode being moved between contractions. The annotations here are the result of manual decomposition by an expert investigator. The expert selected on channel for each MU in which the discharge times were considered accurately identified. These channels are listed in the infotext fields of the eaf files.

* Please cite this data as:
Florestal JR, Mathieu PA,McGill KC. Automatic decomposition of multi-channel intramuscular EMG signals. J Electromyogr Kinesiol epub ahead of print, 2007. [The data are available as dataset R008 at http://www.emglab.net]

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