EMG multielettrodica computerizzata: note techniche per la registrazione ed elaborazione parallela off-line.

Translated title of the contribution: Multielectronic computerized EMG: technical notes on the recording and parallel off-line elaboration

G. Filligoi, A. Berardelli, G. Bini, G. Cruccu, M. Manfredi, M. Visconti

Research output: Contribution to journalArticlepeer-review

Abstract

A Multielectrodic EMG analysis program is developing. The purpose is to get as short as possible the main EMG parameters (amplitude, duration, frequency) of most motor units, and to reach an estimation of the anatomical extent of single units. According to the muscle extent a variable number of electrodes are inserted crosswise the fibers. EMG signals are simultaneously recorded on a multichannel AMPEX FR1300 and then off-line processed by a 21MX HP minicomputer connected with a 5Mbytes disc drive. Some technical problems had to be solved:channel amplification adjustment to avoid any difference among preamplifiers calibration and filtering, severe hum filtering of main power that is specially strong in nultielectrodic recording systems, the need of sampling at the same Nyquist time the signals of different channels. The computer is instructed to identify the "sinchronous" units i.e. the motor units recorded from more than one channel. These motor units are detected, counted and deleted from all the channels, except the one where they show the maximum amplitude. The percentage of these sinchronous units depends upon the interelectrodic distance and their anatomical area, thus it can support an evaluation of motor unit anatomical spread.

Translated title of the contributionMultielectronic computerized EMG: technical notes on the recording and parallel off-line elaboration
Original languageItalian
Pages (from-to)1355-1361
Number of pages7
JournalBollettino della Societa Italiana di Biologia Sperimentale
Volume55
Issue number14
Publication statusPublished - Jul 30 1979

ASJC Scopus subject areas

  • Medicine(all)

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