A Lifetime Without Memory

H. M., an Unforgettable Amnesiac, Dies at 82 - Obituary (Obit) - NYTimes.com

And for those five decades, he was recognized as the most important patient in the history of brain science. As a participant in hundreds of studies, he helped scientists understand the biology of learning, memory and physical dexterity, as well as the fragile nature of human identity.

Henry Gustav Molaison, born on Feb. 26, 1926, left no survivors. He left a legacy in science that cannot be erased.

Farewell, Mr. H. M.!