Indicate what does the electro-myography study.

Indicate what does the electro-myography study.

• A. it is a method which studies the movement of the lower jaw during mastication.
• B. the muscular tonus during contraction
• C. perfusing of TMJ
• D. registers the bio-potential of the muscles during contraction

Answer: (D)

Electromyography measures the electrical activity generated by muscle fibers when they contract. Muscles produce bio-potentials as motor units fire, and EMG captures these signals with electrodes to show how actively a muscle is working, when it activates, and how the activity is coordinated. This makes EMG the best description for what the study records—the bio-potential of the muscles during contraction. The other ideas describe movement, resting muscle tone, or blood flow, which EMG does not directly measure.

Electromyography measures the electrical activity generated by muscle fibers when they contract. Muscles produce bio-potentials as motor units fire, and EMG captures these signals with electrodes to show how actively a muscle is working, when it activates, and how the activity is coordinated. This makes EMG the best description for what the study records—the bio-potential of the muscles during contraction. The other ideas describe movement, resting muscle tone, or blood flow, which EMG does not directly measure.