Who is patient HM?

Patient HM, whose full name was Henry Molaison, is a significant figure in the study of memory within the field of neuroscience. He suffered from severe and frequent seizures and underwent a surgical procedure where his hippocampi were removed to control his epilepsy. This surgery led to him losing the ability to form new explicit memories, though he retained some older memories. His case has been pivotal in helping scientists understand the role of the hippocampus in forming new memories 1 .