1. Electromyography: The analysis of muscle electrical activity
The electromyogram
Recording the Electromyogram
Factors affecting electromyogram
Analyzing the electromyogram
Applications of electromyography

2. Electromyography Recording and interpreting the electrical activity of muscle’s action potential

5. Recording the electromyogram
Electrodes –
Size
Number
Placement
Signal conduction – wires or telemetry?
Signal conditioning
Amplification
Filtering
Analog to digital conversion
Integration
Frequency analysis

8. Filtering: Effect of different cutoff frequencies on EMG

9. Factors affecting the electromyogram

11. Analyzing the EMG signal

12. The concept of
Frequency
decomposition

13. Converting EMG from time domain to frequency domain
What is the time block,
Or window over which
Frequency analysis is
done?

14. EMG in the Frequency Domain

15. Applications of electromyography
Timing of excitation
Degree of excitation
Normalization procedures
Muscle force-emg relationship
Muscle fatigue
Clinical gait analysis
Ergonomics
Limitations of EMG

16. Timing and degree of excitation

17. EMG-force
relationship

18. Electromechanical
delay

19. Windowing is a critical step in converting EMG signal from time to frequency domain

20. The fatigue index
From EMG –
Review the
Assumptions
Inherent in this
procedure

21. Thank you