The famous case of H.M. demonstrated "Anterograde, " amnesia, a condition in which a person can remember previously encoded memories but cannot encode new ones.
H.M is initials for Henry Molaison, the American man who suffered memory loss during a seizure operation conducted on him in Hartford, August 1953.
Before the operation, H.M. was suffering from constant seizures, and retrograde memory loss (for 11 years)
However, after the neurosurgical operation that led to the removal of his hippocampus by William Beecher Scoville, H.M began demonstrating Anterograde.
H.M. (Henry Molaison) died at the age of 82 years in 2008.
Hence, in this case, it is concluded that the correct answer is "Anterograde."
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