Alexander has experienced a traumatic brain injury.Subsequent to the injury, he is unable to form new memories.He can recall events from the distant past, but if he meets a person and has a conversation, then that person leaves the room and returns, he will not recall that they spoke a few moments earlier.Alexander has

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Alexander's inability to form new memories is a classic symptom of anterograde amnesia, which results from damage to the hippocampus and other structures involved in the formation and consolidation of new memories. Retrograde amnesia is the loss of memories that were formed before the onset of the amnesia, which is not the case for Alexander. Alzheimer's disease is a chronic neurodegenerative disease that affects mainly memory, thinking, and behavior, but it usually has a gradual onset and progression, which is not consistent with Alexander's condition. Korsakoff's syndrome is a type of amnesia that results from severe thiamine deficiency, often associated with chronic alcoholism, but it typically presents with both retrograde and anterograde amnesia, as well as confabulation and other cognitive deficits, which do not match Alexander's symptoms.

Alexander Has Experienced a Traumatic Brain Injury