Ergonomics

BASED ON MUSCLE PHYSIOLOGY AND MUSCLE MECHANICS DISCUSS THE

FOLLOWING ITEMS

1. Discuss the theory behind generation of electrical voltage between the EMG surface electrodes from the muscle contraction. Start with EMG wave form from a single muscle fiber, then for motor unit and then for a number of motor units working together to produce the muscle force.

2. Make a plot of the EMG values against the force levels for each experimental participant. Is the relationship linear or nonlinear? Discuss this relationship based on muscle mechanics.

3. Discuss how the muscle fatigue characteristics that can be analyzed using EMG.