Question:
Which of the following techniques is used to measure the variations in the activity of Ascending Reticular Activating System (ARAS)?
Which of the following techniques is used to measure the variations in the activity of Ascending Reticular Activating System (ARAS)?
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EEG is a valuable tool for studying brain waves and activity associated with different neural systems, including the ARAS.
Updated On: Nov 21, 2025
- ECG
- PET
- fMRI
- EEG
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding ARAS.
The Ascending Reticular Activating System (ARAS) plays a crucial role in regulating wakefulness and alertness. To measure its activity, various brain imaging techniques are used.
Step 2: Analyzing the options.
- (A) Incorrect, ECG (Electrocardiogram) measures heart activity, not brain activity.
- (B) Incorrect, PET (Positron Emission Tomography) is used for imaging metabolic activity in the brain but is not specifically designed for measuring ARAS.
- (C) Incorrect, fMRI (functional Magnetic Resonance Imaging) detects brain activity by measuring blood flow but is not typically used for ARAS specifically.
- (D) Correct, EEG (Electroencephalogram) is a technique that directly measures electrical activity in the brain, including that of the ARAS.
Step 3: Conclusion.
Thus, the correct answer is (D) EEG.
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