Henry Gustav Molaison (February 26, 1926 – December 2, 2008), known widely as H.M., was an American who had a bilateral medial temporal lobectomy to surgically resect the anterior two thirds of his hippocampi, parahippocampal cortices, entorhinal cortices, piriform cortices, and amygdalae in an attempt to cure his …

What happened to Henry Molaison?

Henry Molaison (HM) taught us about memory by losing his. HM, age 60. Henry Molaison, known by thousands of psychology students as “HM,” lost his memory on an operating table in a hospital in Hartford in August 1953. He was 27 years old and had suffered from epileptic seizures for many years.

What was wrong with hm?

On September 1, 1953, time stopped for Henry Molaison. For roughly 10 years, the 27-year-old had suffered severe seizures. The seizures abated, but afterwards Molaison was left with permanent amnesia. …