Question

Which of the following is a preferred electrode for measuring EMG?

• A. Surface electrodes
• B. Needle electrodes
• C. Pregelled electrodes
• D. Scalp electrodes

Hint:

\textbf{Needle electrodes} are preferred in EMG because they provide direct and accurate readings from muscle fibers, unlike surface or pregelled electrodes.

Answer 1

The Correct Option is B

EMG (Electromyography) is a diagnostic procedure used to assess the health of muscles and the nerve cells that control them.
The most preferred electrodes for EMG are needle electrodes, because they can be inserted directly into the muscle tissue and are capable of measuring the electrical activity of individual muscle fibers with high precision.
In contrast, surface electrodes only record general muscle activity from the skin’s surface and are less accurate for deep or small muscles.
Thus, needle electrodes provide better spatial resolution and signal quality, which is critical for diagnosing neuromuscular disorders.