Korsakoff’s psychosis is seen in
**Core Concept**
Korsakoff's psychosis is a chronic neurological disorder characterized by severe memory impairment, particularly anterograde amnesia, confabulation, and difficulty in learning new information. This condition is often associated with thiamine deficiency, which can occur due to chronic alcohol abuse.
**Why the Correct Answer is Right**
Korsakoff's psychosis typically results from thiamine deficiency, which can be caused by chronic alcohol abuse, malnutrition, or other conditions that lead to inadequate thiamine intake. The thiamine deficiency disrupts the normal functioning of the brain's limbic system, particularly the hippocampus and the mammillary bodies. This disruption impairs the formation of new memories, leading to anterograde amnesia. The confabulation seen in Korsakoff's psychosis is thought to be a result of the brain's attempt to compensate for the memory deficit by generating false memories.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Wernicke's encephalopathy is a separate condition that also results from thiamine deficiency, but it is characterized by acute confusion, ataxia, and eye movement abnormalities, rather than chronic memory impairment.
**Option B:** This option is incorrect because Alzheimer's disease is a neurodegenerative disorder that primarily affects older adults and is characterized by progressive memory loss, cognitive decline, and personality changes.
**Option C:** This option is incorrect because Frontotemporal dementia is a group of rare brain disorders that affect the front and temporal lobes, leading to changes in personality, behavior, and language, but not typically anterograde amnesia.
**Clinical Pearl / High-Yield Fact**
Korsakoff's psychosis is often seen in individuals with a history of chronic alcohol abuse, and it is essential to recognize this condition to provide appropriate treatment, which may include thiamine supplementation and supportive care.
**Correct Answer:** C.