Abc del emg

The ABC of EMG
A Practical Introduction to Kinesiological Electromyography Peter Konrad
Version 1.0 April 2005

N R O A O X N U . S .A ,N .I C .

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Noraxon INC. USA.

Contents:
SIGNAL ORIGIN AND ACQUISITION
INTRODUCTION & DEFINITION .................................................................................................4 USE AND BENEFITS OF EMG...................................................................................................5 SIGNAL ORIGIN 1 .......................................................................................................................6 THE GENERATION OF THE EMG SIGNAL................................................................................7 SIGNAL PROPAGATION ANDDETECTION..............................................................................8 COMPOSITION OF EMG SIGNAL ..............................................................................................9 NATURE THE OF EMG SIGNAL...............................................................................................10 THE INFLUENCE OF DETECTION CONDITION......................................................................11 EMG AMPLIFICATION ..............................................................................................................12 COMPUTATION OF THE EMG SIGNAL ...................................................................................13 SKIN PREPARATION................................................................................................................14 SURFACEELECTRODE SELECTION .....................................................................................15 FINE WIRE ELECTRODES .......................................................................................................16 GUIDELINES ELECTRODE APPLICATION .............................................................................17 SPECIFIC ASPECTS OF ELECTRODEAPPLICATION...........................................................18 MUSCLE MAP FRONTAL .........................................................................................................19 MUSCLE MAP DORSAL ...........................................................................................................20 SIGNAL CHECKPROCEDURES..............................................................................................21 SIGNAL CHECK PROCEDURES..............................................................................................22 SIGNAL CHECK PROCEDURES..............................................................................................23 EMGARTIFACTS......................................................................................................................24 PREPARE EMG - ACTION LIST ...............................................................................................25

SIGNAL PROCESSING
SIGNAL PROCESSING - RECTIFICATION ..............................................................................26 SIGNAL PROCESSING - SMOOTHING....................................................................................27 SIGNALPROCESSING - DIGITAL FILTERING........................................................................28 SIGNAL PROCESSING – AMPLITUDE NORMALIZATION .....................................................29 SIGNAL PROCESSING – ECG REDUCTION ...........................................................................35 TIME NORMALIZATION FOR REPETITION CYCLES.............................................................36 AVERAGE EMG / ENSEMBLE AVERAGES.............................................................................37 EMG AMPLITUDE PARAMETERS ...........................................................................................39 EMG FREQUENCY PARAMETERS..........................................................................................40 TIMING RELATED...