Leucotome
Encyclopedia
A leucotome or McKenzie Leucotome is a surgical instrument used for performing leucotomies, lobotomies
and other forms of psychosurgery
.
Invented by Canadian
neurosurgeon Dr. Kenneth G. McKenzie in the 1940s, the leucotome has a narrow shaft which is inserted into the brain through a hole in the skull, and then a plunger on the back of the leucotome is depressed to extend a wire loop or metal strip into the brain. The leucotome is then rotated, cutting a core of brain tissue. This type was used by the Nobel prize
-winning Portuguese neurologist Egas Moniz
.
Another, different, surgical instrument also called a leucotome was introduced by Walter Freeman for use in the transorbital lobotomy. Modeled after an ice-pick, it consisted simply of a pointed shaft. It was passed through the tear duct under the eyelid and against the top of the eyesocket. A mallet was used to drive the instrument through the thin layer of bone and into the brain along the plane of the bridge of the nose, to a depth of 5 cm. Due to incidents of breakage, a stronger but essentially identical instrument called an orbitoclast
was later used.
Leucotomies and lobotomies were commonly performed from the 1930s to the 1960s, with a few as late as the 1980s in France.
Lobotomy
Lobotomy "; τομή – tomē: "cut/slice") is a neurosurgical procedure, a form of psychosurgery, also known as a leukotomy or leucotomy . It consists of cutting the connections to and from the prefrontal cortex, the anterior part of the frontal lobes of the brain...
and other forms of psychosurgery
Psychosurgery
Psychosurgery, also called neurosurgery for mental disorder , is the neurosurgical treatment of mental disorder. Psychosurgery has always been a controversial medical field. The modern history of psychosurgery begins in the 1880s under the Swiss psychiatrist Gottlieb Burckhardt...
.
Invented by Canadian
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
neurosurgeon Dr. Kenneth G. McKenzie in the 1940s, the leucotome has a narrow shaft which is inserted into the brain through a hole in the skull, and then a plunger on the back of the leucotome is depressed to extend a wire loop or metal strip into the brain. The leucotome is then rotated, cutting a core of brain tissue. This type was used by the Nobel prize
Nobel Prize
The Nobel Prizes are annual international awards bestowed by Scandinavian committees in recognition of cultural and scientific advances. The will of the Swedish chemist Alfred Nobel, the inventor of dynamite, established the prizes in 1895...
-winning Portuguese neurologist Egas Moniz
Egas Moniz
António Caetano de Abreu Freire Egas Moniz , known as Egas Moniz , was a Portuguese neurologist and the developer of cerebral angiography...
.
Another, different, surgical instrument also called a leucotome was introduced by Walter Freeman for use in the transorbital lobotomy. Modeled after an ice-pick, it consisted simply of a pointed shaft. It was passed through the tear duct under the eyelid and against the top of the eyesocket. A mallet was used to drive the instrument through the thin layer of bone and into the brain along the plane of the bridge of the nose, to a depth of 5 cm. Due to incidents of breakage, a stronger but essentially identical instrument called an orbitoclast
Orbitoclast
An orbitoclast is a surgical instrument used for performing transorbital lobotomies. It was invented by Dr. Walter Freeman in 1948 to replace the unique form of leucotome used up until that point for the transorbital lobotomy procedure. This instrument is an ice pick with some gradation marks...
was later used.
Leucotomies and lobotomies were commonly performed from the 1930s to the 1960s, with a few as late as the 1980s in France.
