Question

EMG signals have the highest frequency among EEG, ECG, and EMG because

• A. Muscle fibers contract rapidly
• B. Electrodes are invasive
• C. Muscles generate large voltages
• D. EMG uses DC amplification

Hint:

Frequency comparison: \[ \boxed{ \text{EMG}>\text{ECG}>\text{EEG} } \] EMG contains the highest-frequency components because of rapid muscle activation.

Answer 1

The Correct Option is A

Step 1: Recall the frequency ranges of biomedical signals. Typical frequency ranges are \[ \begin{aligned} \text{EEG} &\approx 0.5-100\ \text{Hz}, \text{ECG} &\approx 0.05-150\ \text{Hz}, \text{EMG} &\approx 20-2000\ \text{Hz}. \end{aligned} \]

Step 2: Identify the reason. Muscle fibers produce rapid electrical activity during contraction, resulting in higher frequency components. Hence, \[ \boxed{\text{Muscle fibers contract rapidly}} \] is the correct answer. Therefore, \[ \boxed{(A)} \] is the correct answer.