Famous brain surgery patient H.M. retained a chunk of hippocampus

Amnesia probably due to the loss of other regions, connections

By Laura Sanders, 16:50 PM January 28, 2014

After a brain surgeon accidentally took away his memory in 1953, 27-year-old Henry Molaison became one of the most informative cases in psychology. For the rest of his life, the patient known as H.M. donated time to scientists who used the tragedy to study his amnesia. Now, five years after his death, Molaison is still teaching scientists about how the brain makes and stores memories.

A detailed analysis of Molaison’s postmortem brain, generously donated to scientists, reveals a surprising amo...

Source URL: https://www.sciencenews.org/article/famous-brain-surgery-patient-hm-retained-chunk-hippocampus