Multiple memory systems
Declarative vs procedural dissociations from lesions.
Milner’s work turned lesion cases into systems neuroscience: dissociations became maps of memory kinds.
Educational history of neuroscience — not medical advice. Patient identities and clinical details are discussed at the level of published science.
Pillars
Patient H.M.
Landmark medial temporal amnesia case.
Careful behavioural testing
Tasks that expose what casual talk misses.
Ethics of irreversible surgery
Consent, anonymity and cognitive risk lessons.
Key facts
1953 surgery / 1957 report
Scoville & Milner link MTL resection to recent-memory loss.
Mirror drawing
H.M. improved skill without recalling prior sessions.
Montreal Neurological Institute
Career home for decades of patient-based science.
Frontal contributions
Extended work beyond MTL into frontal strategy and memory.
Mentorship legacy
Trained generations of neuropsychologists.
Identity after death
H.M. named Henry Molaison — ethics of anonymity evolved.
Pair with Hippocampus, Memory, H.M. legacy and Frontal pages.
Sources & research
- Loss of recent memory after bilateral hippocampal lesionsLandmark H.M. memory loss report.DOI
- The legacy of patient H.M. for neuroscienceLegacy review of patient H.M.DOI
- Cognitive neuroscience and the study of memoryCognitive neuroscience of memory synthesis.DOI
Keep exploring
More in Pioneers
🖋️
Santiago Ramón y Cajal
The neuron doctrine — drawing the brain cell by cell.
Research 58 🗣️Paul Broca
Speech production and the birth of modern localization.
Research 69 👂Carl Wernicke
Comprehension aphasia and the language network idea.
Research 58 🗺️Wilder Penfield
Cortical maps from the operating room — the sensory homunculus.
Research 85 👁️Hubel & Wiesel
How visual cortex builds edges, columns and critical periods.
Research 58 🐌Eric Kandel
Learning as synaptic change — from Aplysia to human memory.
Research 93 ❤️Antonio Damasio
Feeling, self and somatic markers in decision circuits.
Research 78 🎨Margaret Livingstone
Vision, art and how cortex separates colour, form and motion.
Research 74 🧪Rita Levi-Montalcini
Nerve growth factor — discovering how neurons survive and wire.
Research 97 🗺️John O'Keefe
Place cells and the cognitive map inside the hippocampus.
Research 51