In korsakoff psychosis all are seen except :
**Core Concept**
Korsakoff psychosis, also known as Korsakoff syndrome, is a neurological disorder characterized by a profound memory disorder, particularly anterograde amnesia, which is the inability to form new memories. This condition is typically associated with chronic alcoholism and thiamine deficiency.
**Why the Correct Answer is Right**
Korsakoff psychosis is primarily caused by the degeneration of the mammillary bodies, a pair of small structures in the diencephalon (part of the forebrain) that play a crucial role in memory formation. The degeneration of the mammillary bodies is a result of the lack of thiamine (vitamin B1), which is essential for the proper functioning of the brain. The resulting memory disorder is a result of the disruption of neural connections and the degeneration of neurons in the hippocampus and other areas of the brain involved in memory formation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because apathy is actually a common feature of Korsakoff psychosis, not an exception. Patients with Korsakoff psychosis often exhibit apathy, which is a lack of interest or concern for their surroundings.
**Option B:** This option is incorrect because confabulation is a hallmark feature of Korsakoff psychosis. Confabulation is the production of false memories, often with the intention of filling in gaps in memory, but without any basis in reality.
**Option C:** This option is incorrect because ataxia, which is a lack of coordination and balance, is not typically seen in Korsakoff psychosis. However, ataxia is more commonly associated with Wernicke encephalopathy, a condition that often precedes Korsakoff psychosis.
**Clinical Pearl / High-Yield Fact**
Korsakoff psychosis is often associated with chronic alcoholism, and it is essential to consider this diagnosis in patients with a history of heavy drinking who present with memory disorders. Additionally, early recognition and treatment of thiamine deficiency can help prevent the development of Korsakoff psychosis.
**Correct Answer:** A.