EMG 2017 Wim Grooten Quiz

What stands EMG for Electronic myographics Electromyography Electromyog E = M *g

2. What can you do with the raw signal? Compare amplitude levels between muscles Compare timing (on/off) between muscles in ms Compare fatigue between muscles None of these three

3. Which ways of normalization procedures could be appropriate in ergonomic studies? % MVC (%maximum voluntary contraction) %VC (%voluntary contraction) % lifting 1 kg % of baseline

4. What do you know about power? Power can be negative or positive, depending on the direction of the velocity and the acceleration Power can measure endurance Power is a measurement of performance

Think about the experiment we did on wednesday. 5. How can you discriminate between eccentric and concentric contractions Compare the acceleration curves (direction) with the displacement curves (direction) Look to the amplitude of the EMG curves Compare the acceleration curves with the EMG signal Compare the power curves and the EMG signals

Think about the Power spectrum. 6. What is the best way to make conclusions about a normal persons endurance? You can look to the amplitude of the EMG You can look to the number of gaps You can study the frequency You can study the shift of the median frequency

Think about the MOVING WINDOW filtering method 7. What negative aspects do you have with it You cannot compare amplitudes anymore You cannot compare the area under the curve You have changed the time onsets of the EMG You have increased the artefacts

Answers B D, maybe B Not B A, B, C D C