Introduction
You wonder how a single surgical error can unlock the deepest secrets of human memory while simultaneously destroying a person's life. You struggle to understand the complex biological foundations of consciousness and the dark history of medical experiments that preceded modern neuroscience. Luke Dittrich reveals these truths through the tragic fate of Henry Molaison, who lived for decades as Patient H.M.
The tragic life of Patient H.M. exposes the dark history of psychosurgery and the complex biological foundations of human memory.
The book combines the history of neurosurgery and institutional psychiatry with the personal narratives of the author and the scientists who studied Henry. You will examine the evolution of brain operations, the harsh realities of mid-century asylums, and the landmark discoveries that reshaped cognitive science.
- How did ancient trepanation evolve into twentieth-century lobotomies?
- What happened during the fateful operation performed by William Scoville in 1953?
- How did Brenda Milner and Suzanne Corkin map the architecture of the human mind using a single patient?
1. History of Neurosurgery and Psychosurgery
Early medical pioneers moved from ancient trepanation and secular brain theories to radical twentieth-century psychosurgical interventions aimed at controlling mental illness and epilepsy.
Ancient Brain Trauma
In the fourth century B.C.E., Hippocrates pioneered the secular medical view that epilepsy originates in the physical brain rather than from divine intervention. He mocked contemporary charlatans who blamed gods like Poseidon or Apollo for specific epileptic manifestations such as foaming at the mouth or teeth-grinding. In his essay On the Sacred Disease, Hippocrates rejected supernatural explanations and argued that the brain is the physical source of the affliction.
Thousands of years ago, the ancient Edwin Smith Papyrus demonstrated that early Egyptian medicine contained advanced secular knowledge of brain trauma and neuroanatomy. This medical text catalogs battlefield injuries and describes the brain and its membranes with remarkable poetic detail while advising conservative, non-invasive treatment.
Case 6 of the papyrus instructs physicians to probe a cranial wound, observe copper-smelting ripples and a throbbing membrane, daub it with oil, and avoid bandaging until a crisis passes.
The scroll measures fifteen feet in length and contains forty-eight case studies. Twenty-seven of these case studies involve head trauma. James Henry Breasted published his translation of the text in 1930, long after Edwin Smith purchased the papyrus scroll in 1862 and his daughter donated it upon his death in 1906.
Ancient civilizations performed cranial surgery globally, and evidence shows patients frequently survived these holes cut into the skull. Skulls from diverse cultures and millennia feature man-made holes, often located on the left frontoparietal area due to close-quarters combat among right-handed opponents. Examination of the edges reveals new bone growth indicating postoperative survival.
People began cutting holes into skulls ten thousand years ago, roughly thirty-five hundred years prior to anesthesia. Inca skulls in Peru and a trove of skulls at a seven-thousand-year-old grave site in Ensisheim, France, display surgical openings with signs of healing and bone regeneration.
The Rise of Lobotomy
Gottlieb Burckhardt performed the first modern neurosurgical attacks on mental illness by surgically removing portions of brain tissue. Believing that physical destruction of brain tissue could alleviate madness, Burckhardt operated on severely disturbed asylum patients by opening their skulls and removing portions of their cerebral cortex, leading to a quieter, more tractable demeanor despite severe adverse effects.
In 1888, Gottlieb Burckhardt performed five operations on a fifty-one-year-old woman at an asylum in Prefargier, removing a total of eighteen grams of her brain across multiple areas. By the end of 1889, he had operated on five more patients. Two of those patients died, two became epileptic, and one committed suicide.
Egas Moniz developed the leucotomy procedure, cutting the white matter of the frontal lobes to treat psychiatric disorders. Inspired by chimpanzee experiments where frontal lobe ablation eliminated experimental neurosis, Moniz and his colleague Almeida Lima inserted a specialized metal tube into the frontal lobes and used an extruded wire loop to sever nerve pathways.
On November 12, 1935, Almeida Lima drilled two holes into a depressed patient's forehead and performed the world's first leucotomy using a device called a leucotome. The metal tube reached a depth of eight centimeters, and Moniz performed nineteen more leucotomies over the next few months.
Walter Freeman popularized psychosurgery in the United States by developing the lobotomy and performing it at a prolific pace. Freeman adapted Moniz's technique into a precision method using a surgical scalpel approached through the sides of the skull rather than the forehead, coining the term psychosurgery and promoting the operation as a direct remedy for various psychological misfits.
On September 16, 1936, Freeman and his partner James Watts performed the first leucotomy in the U.S. on an anxious housewife from Topeka, Kansas. By October 31, 1939, they reached the fifty-second lobotomy. Patient 53 gained between eighty-five and two hundred ten pounds post-operation, while Freeman's patients ranged in age from seven years old to seventy-two years old.
Walter Freeman utilized a disorientation yardstick during operations to ensure sufficient brain damage had been inflicted. Freeman kept patients conscious during lobotomies so he could ask questions and monitor cognitive decline. When the patient became confused and disoriented following the final quadrant section, he was satisfied the operation was effective.
During an operation on October 31, 1939, a patient sang America the Beautiful while her frontal lobes were sectioned, stopping and becoming disoriented only after the final quadrant was cut. Freeman watched the patient's eyes in silence for two minutes after the fourth cut, which reached an insertion depth of eight centimeters.
Walter Freeman relied on specific behavioral signs to gauge the success of a frontal lobe operation.
You can follow his intraoperative protocol during a psychosurgical intervention:
- Keep the patient under a local anesthetic and fully conscious during the operation.
- Ask the patient questions to monitor cognitive progress and lucidity.
- Section the upper and lower quadrants of the frontal lobes.
- Continue cutting until the patient becomes confused and disoriented.
2. Asylum Treatments and Institutional Practices
Psychiatric institutions evolved from early models of moral management and pleasant environments toward heavily managed clinical facilities. The Hartford Retreat for the Insane, founded in 1822, championed moral management, providing patients with pleasant surroundings, communal dining, and freedom from chains. By the 1940s, under Dr. C. Charles Burlingame, it was renamed the Institute of Living and maintained a meticulously normal country-club appearance while masking strict rules and clinical interventions.
Twentieth-century psychiatric asylums utilized extreme interventions like hydrotherapy, pyretotherapy, and mass lobotomy programs to manage patient populations.
Charles Dickens visited the asylum in 1842 and praised its humane approach, whereas a century later the facility featured pseudo-Elizabethan shopping streets called Pomander Walk and strict rules against patients discussing symptoms. Patients experienced continuous hydrotherapy, where staff stripped, oiled, and placed them in large tubs filled with cold water, strapping them down beneath a heavy fabric sheet with only an aperture for the head. Treatments lasted from hours to weeks, with staff removing the patient every four hours to relubricate her and giving an alcohol rub every twelve hours.
Institutional Therapies
Pyretotherapy, or fever therapy, was utilized in psychiatric institutions to induce high fevers in patients using specialized equipment. Patients were placed inside a copper cabinet called an electropyrexia cabinet, where an infrared lamp, an inductotherm, and a fan generated heat and humidity. The author's grandmother was placed in the Pyretotherapy Room at the Institute of Living, where attendants used an inductotherm to induce fevers ranging from 102 degrees initially up to 105 or 106 degrees by the fourth day after a six a.m. wake-up call for the eight-hour session inside the cabinet.
Superintendent Charles Burlingame believed that patient fear stemmed from the presentation and terminology rather than the treatments themselves, leading him to order that insulin, metrazol, and electric shock treatments be officially renamed as sleep therapies. You can follow his institutional rules for managing patient perception during psychiatric treatments:
- Do not discuss treatments with guests unless necessary.
- Always stress the positive side if the conversation turns to treatment.
- Never refer to or present therapeutic measures as punishment or threats.
- Replace the misnomer shock with sleep in all psychiatric vocabulary for insulin, metrazol, and electric treatments.
The Connecticut Lobotomy Study
Public mental health crises in post-WWII America led to state-coordinated surgical programs aimed at reducing asylum populations. Following the 1946 Life magazine exposé Bedlam 1946 exposing horrific asylum conditions, Connecticut became the first state to launch a scientific, controlled lobotomy study across its public and private mental hospitals to ease operational and financial burdens. On November 14, 1946, Dr. William Beecher Scoville performed the first lobotomy in operating room 2200 at the 906-acre Connecticut State Hospital in Middletown on a 31-year-old inmate.
Superintendent Charles Burlingame used institutional psychosurgery to completely obliterate a patient's existing personality and reconstruct a socially compliant one. At the Institute of Living, Burlingame claimed success in reversing the sexual orientation of a gay man and altering the antagonistic attitude of a woman following an unfortunate love affair. Meanwhile, the U.S. military tribunal during the Doctors Trial prosecuted twenty-three defendants, mostly doctors and Nazis, for murders and tortures committed under the guise of medical science, leading to the Nuremberg Code to govern human experimentation ethically.
3. The Fateful Operation on Henry Molaison
Driven by a quest for precision in neurosurgery, Dr. William Scoville performed a bilateral medial temporal lobectomy on Henry Molaison, unintentionally destroying his capacity for conscious memory.
Pre-Surgical Evaluations
Henry Molaison suffered from severe epilepsy and frequent petit mal absences. Massive doses of powerful medications failed to provide relief. You see him taking Dilantin five times a day, Mesantoin three times a day, Tridione three times a day, and phenobarbital twice a day.
Henry worked at the Underwood factory assembling typewriters. His escalating seizures disrupted his employment in precision trades. He trained as a motor winder at Ace Electric Motors before working on the assembly line.
A childhood bicycle accident caused severe head trauma that triggered this debilitating epilepsy. Around 1933 or 1934 in Colt Park, Hartford, a bicyclist struck seven or eight year old Henry. The impact caused a deep gash, torsional forces, and blunt-force trauma that ruptured neurons and created an epileptogenic scar.
Psychologist Liselotte Fischer administered Rorschach inkblot tests and IQ tests before the surgery. During testing on August 24, 1953, Henry scored 104 on an IQ test. He drew a male hospital patient with a crosspatch mark on his temple, reflecting his acute anxiety while experiencing twelve petit mal seizures.
The Bilateral Resection
Lacking a clear epileptic focus on the electroencephalograph, Dr. Scoville made a fateful decision. He decided to suction out both hemispheres of Henry Molaison's medial temporal lobes.
During the surgery on August 25, 1953, Dr. Scoville removed Henry's amygdala, uncus, entorhinal cortex, and hippocampus bilaterally. Dr. Scoville used his suction catheter to destroy both medial temporal lobes in a patient whose only major dysfunction was epilepsy.
This bilateral resection resulted in a very grave, permanent recent memory loss. The surgery made it impossible to remember room locations, associate names, or navigate to a restroom. Six weeks after the operation, Dr. Scoville added a paragraph to his Journal of Neurosurgery paper describing the profound amnesia that prevented the patient from remembering his living arrangements or close associates.
Scientists shielded Henry's true identity behind the pseudonym Patient H.M. to protect his privacy. Out of the hundreds of research papers published during the fifty-five years between his operation and his death, none revealed his full biographical details to the outside world. Researchers writing about Henry only provided fragmented biographical clues, such as relatives in Louisiana or his birth year of 1926.
4. Unlocking the Secrets of Human Memory
Through decades of meticulous testing by Brenda Milner, Suzanne Corkin, and other researchers, Patient H.M. revealed that the brain houses multiple distinct memory systems operating independently.
Brenda Milner began testing epilepsy patients before and after Wilder Penfield's surgeries to discover if the procedures caused unexpected functional deficits. She administered intelligence and memory tests, such as reading short stories and asking patients to recall them, to see if removing portions of the temporal lobes affected their cognitive abilities.
Patient P.B., a forty-eight-year-old civil engineer, showed intelligence scores measuring 119 to 120 on the Wechsler scale before and after surgery. Despite superior scores, he completely forgot two test stories read to him just minutes earlier.
Brenda Milner came to the Neuro in 1950 after completing her Cambridge University examinations in 1937. In April 1955, she boarded the night train from Montreal to Hartford to evaluate William Scoville's other bilateral medial temporal lobe patients. Formal testing revealed they all shared a global loss of recent memory directly proportionate to the amount of hippocampal tissue removed.
Milner visited Patient M.B., a manic depressive woman who had a radical bilateral medial temporal lobe resection. She also tested Patient D.C., a former doctor in Chicago who attempted to kill his wife with an axe before undergoing Scoville's surgery.
The Discovery of Amnesia
The landmark 1957 paper by William Scoville and Brenda Milner established the hippocampus and medial temporal lobes as the physical seat of memory. Published in May 1957 in the Journal of Neurology, Neurosurgery & Psychiatry, the article introduced Patient H.M. and several asylum cases to the world. It declared unequivocally that bilateral medial temporal lobe lesions result in persistent impairment of recent memory, solving an ancient neurological mystery.
Procedural Versus Declarative Memory
The human brain contains at least two distinct and independent memory systems: one for episodic events and another for learned skills. Brenda Milner's observation of Henry's ability to improve on the star-tracing puzzle without explicit memory led to the revolutionary realization that the episodic memory system is severely compromised in amnesics while the procedural skill-acquisition system remains intact.
Brenda Milner tested Henry on the mirror-tracing test. Although Henry had no memory of seeing or doing the test the previous day, his performance remained highly proficient, proving he retained how to do the task without remembering doing it.
Suzanne Corkin tested patients on a tactually guided maze by touch alone in May 1962 at the Montreal Neurological Institute. Henry made about eighty errors on his first attempt through Corkin's maze and did not improve his error rate over dozens of trials, but his completion time dropped from about ninety seconds down to less than forty seconds. This demonstrated that his motor skills and procedural memory for how to navigate were fully functional, even as his episodic memory failed.
Henry's entire past, including events predating his brain surgery, became entirely semanticized, leaving him with disconnected facts rather than living narratives. Through interviews, Corkin and her colleagues demonstrated that Henry lacked the ability to access episodic memories altogether.
When asked by Suzanne Corkin in 1992 for his favorite memory of his mother, Henry could only state the fact that she was his mother. He could not recall any specific holiday, Christmas, or birthday event.
10 Key Ideas
- Early medical pioneers moved from ancient trepanation and secular brain theories to radical twentieth-century psychosurgical interventions aimed at controlling mental illness and epilepsy.
- Walter Freeman relied on specific behavioral signs to gauge the success of a frontal lobe operation.
- Twentieth-century psychiatric asylums utilized extreme interventions like hydrotherapy, pyretotherapy, and mass lobotomy programs to manage patient populations.
- A childhood bicycle accident caused severe head trauma that triggered this debilitating epilepsy.
- Driven by a quest for precision in neurosurgery, Dr. William Scoville performed a bilateral medial temporal lobectomy on Henry Molaison, unintentionally destroying his capacity for conscious memory.
- Dr. Scoville used his suction catheter to destroy both medial temporal lobes in a patient whose only major dysfunction was epilepsy.
- Researchers shielded Henry's true identity behind the pseudonym Patient H.M. to protect his privacy.
- Through decades of meticulous testing by Brenda Milner, Suzanne Corkin, and other researchers, Patient H.M. revealed that the brain houses multiple distinct memory systems operating independently.
- The landmark 1957 paper by William Scoville and Brenda Milner established the hippocampus and medial temporal lobes as the physical seat of memory.
- Brenda Milner's observation of Henry's ability to improve on the star-tracing puzzle without explicit memory led to the revolutionary realization that the episodic memory system is severely compromised in amnesics while the procedural skill-acquisition system remains intact.