The disorder that affects the memory and cognitive function in older persons is called?

RRB Staff Nurse Kolkata-2015

Medical & Surgical Nursing

Easy

Appeared in: RRB Staff Nurse Kolkata-2015

Explanation

Dementia is the correct term for a syndrome, usually of a chronic or progressive nature, that leads to a deterioration in cognitive function beyond what might be expected from normal aging.
It affects memory, thinking, orientation, comprehension, calculation, learning capacity, language, and judgment.
The impairment in cognitive function is commonly accompanied, and occasionally preceded, by changes in mood, emotional control, behavior, or motivation.
Unlike delirium, consciousness is not affected in dementia.

Option A: Insomnia is a sleep disorder. While chronic lack of sleep can impair cognitive performance, it is not the primary disorder of memory and cognition itself.
Option B: Paranoia involves irrational suspicions or distrust of others. It is a symptom related to thought content (psychosis), not a global decline in multiple cognitive domains like memory and reasoning.
Option C: Aphasia is a specific language disorder that affects a person's ability to communicate. It can result from a stroke or brain injury. While it affects a cognitive domain (language), it doesn't encompass the broad decline in memory and other functions seen in dementia.

Visual 1: Table: Comparison of Dementia, Delirium, and Depression. This visual helps differentiate three common and often confused conditions in the elderly by comparing their onset, course, and key features.
Visual 2: Infographic: Brain areas affected in Alzheimer's disease. This would show the progression of pathology from the hippocampus (memory) to other cortical areas, explaining the pattern of symptom development.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Cognitive Disorders in the Elderly as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in assessing, monitoring, and managing patients with dementia. Key priorities include ensuring patient safety (e.g., preventing falls and wandering), providing reality orientation, using simple communication, and supporting caregivers.
It is vital to rule out reversible causes of cognitive impairment. A thorough assessment includes reviewing medications, checking for infections (like a UTI), and assessing for metabolic or nutritional deficiencies (e.g., Vitamin B12).
What if? If the patient's cognitive decline was acute (developed over hours to days) and fluctuated throughout the day, the most likely diagnosis would be Delirium, not Dementia. This is a medical emergency requiring immediate investigation to find and treat the underlying cause.

How to Approach the Question

First, analyze the keywords in the question: 'disorder', 'affects memory', 'cognitive function', and 'older persons'. This points to a condition primarily defined by a decline in mental abilities in the geriatric population.
Next, define each option. Insomnia is a sleep disorder. Paranoia is a thought disorder. Aphasia is a language disorder. Dementia is a global cognitive disorder.
Compare the definitions to the question's requirements. The question asks for a disorder of both 'memory' and 'cognitive function' generally.
Eliminate the options that are too specific (Aphasia, Paranoia) or address a different primary function (Insomnia).
Select Dementia as it is the only term that describes a broad, progressive decline in multiple cognitive domains, including memory, which is characteristic of the condition described.

Concept Tested & Keywords

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