Cognitive Reflection Test (CRT) Practice

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Test your cognitive skills with the Cognitive Reflection Test. Practice with challenging questions that test reflex and intuition. Improve your decision-making abilities and get ready for the CRT!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which imaging technique is specifically used for diagnosing Alzheimer disease?

CT scan
X-ray
Magnetic resonance spectroscopy (MRS)
Electroencephalogram (EEG)

The correct answer is: Magnetic resonance spectroscopy (MRS)

Magnetic Resonance Spectroscopy (MRS) is a specialized imaging technique that provides metabolic information about tissues, including the brain. In the context of Alzheimer’s disease, MRS can detect changes in specific metabolites and chemical concentrations that are associated with the disease, such as decreased levels of certain neurotransmitters. This ability to identify biochemical changes complements structural imaging methods like MRI and CT scans, which may show atrophy but lack the metabolic insights that MRS offers. While CT scans and EEGs are valuable in the diagnostic process for various conditions, they do not specifically target the metabolic changes that are critical for diagnosing Alzheimer’s disease. Similarly, X-rays primarily provide information about the structure of bones and do not give insights into neurological conditions. MRS is particularly beneficial as it can help in the early detection of Alzheimer’s by revealing alterations that occur even before significant structural changes are visible through other imaging methods. This makes MRS a powerful tool in assessing and understanding Alzheimer’s disease.