Question

Which of the following statements related to biomedical measurements are TRUE?

• A. Electrical activity of neurons in the peripheral nervous system can be measured by ENG
• B. Electrical activity of the retina in response to light stimulus can be measured using EOG
• C. In a human EEG, Gamma waves are high frequency waves compared to Beta, Delta, and Theta waves
• D. P wave in ECG manifests ventricular repolarization

Hint:

Remember: ENG → peripheral nerves, EOG → eye movement, EEG Gamma → highest frequency, ECG P wave → atrial depolarization.

Answer 1

The Correct Option is A, C

Step 1: Understanding ENG and EOG.
ENG (Electroneurography) measures electrical activity of peripheral nerves, making statement (A) TRUE.
EOG (Electrooculogram) measures eye movement potentials, not retinal electrical response to light. Hence (B) is FALSE.
Step 2: EEG wave classification.
Gamma waves (30–100 Hz) are indeed the highest frequency brain waves, higher than Beta, Alpha, Theta, and Delta. Therefore (C) is TRUE.
Step 3: Understanding ECG waves.
P wave represents atrial depolarization, not ventricular repolarization. Ventricular repolarization is represented by the T wave. Hence (D) is FALSE.
Step 4: Conclusion.
Thus, the TRUE statements are (A) and (C).