News Neuroscience

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

Amnesia probably due to the loss of other regions, connections

MEMORIES ON ICE  Embedded in a frozen gelatin block, Henry Molaison’s brain is about to be sliced and imaged.

J. Annese

By Laura Sanders

- More than 2 years ago

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.