Understanding Analogies: Dementia, Memory, Insomnia, Sleep

This question is an analogy, which asks you to find the relationship between the first pair of words and apply that same relationship to the second pair to find the missing word. The key is to identify the connection between 'Dementia' and 'Memory'.

Analyzing the Relationship: Dementia and Memory

'Dementia' is a medical condition. 'Memory' is a cognitive function. The relationship here is that Dementia is a condition that negatively affects or causes problems with Memory. It impairs a person's ability to remember things.

• Dementia: A chronic or persistent disorder of the mental processes caused by brain disease or injury and marked by memory disorders, personality changes, and impaired reasoning.
• Memory: The faculty by which the mind stores and remembers information.

So, the relationship is: [Condition] causes problems with [Function/Activity].

Applying the Relationship to Insomnia

Now let's look at the second pair: 'Insomnia' is related to '_________'.

'Insomnia' is also a medical condition. We need to find the function or activity that Insomnia affects or causes problems with, just as Dementia affects Memory.

• Insomnia: A sleep disorder characterized by difficulty falling and/or staying asleep.

Based on the definition, Insomnia is a condition that causes difficulty with the activity of sleeping.

Evaluating the Options

Let's examine the provided options:

1. Walk: Insomnia is not a condition that causes problems with walking.
2. Sleep: Insomnia is a condition that causes problems with sleeping. This fits the identified relationship perfectly.
3. Run: Insomnia is not a condition that causes problems with running.
4. Forgetting: Forgetting is a symptom of conditions like Dementia, but Insomnia specifically affects the ability to sleep, not the ability to remember (which is forgetting).

Conclusion: Insomnia and Sleep Analogy

Following the same relationship as 'Dementia' is to 'Memory' (where the condition affects the function/activity), 'Insomnia' is a condition that affects 'Sleep'. Therefore, the word that completes the analogy is 'Sleep'.

Revision Table: Key Concepts in Analogies

Additional Information: Related Conditions and Functions

Understanding common relationships between medical conditions, functions, or symptoms is helpful for solving analogies.

• Conditions and Affected Systems: For example, Arthritis affects Joints; Cataracts affect Vision.
• Conditions and Symptoms: For example, Fever is a symptom of Illness; Pain is a symptom of Injury.
• Disorders and Affected Activities: For example, Stammering affects Speech; Blindness affects Sight.

In this specific analogy, we see how a disorder (Dementia, Insomnia) directly impacts a primary function or activity (Memory, Sleep).