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Leucotome
A leucotome or McKenzie Leucotome is a surgical instrument used for performing leucotomies (also known as lobotomy) 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 o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotome
A leucotome or McKenzie Leucotome is a surgical instrument used for performing leucotomies (also known as lobotomy) 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 o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leukotomy
A lobotomy, or leucotomy, is a form of neurosurgical treatment for psychiatric disorder or neurological disorder (e.g. epilepsy) that involves severing connections in the brain's prefrontal cortex. The surgery causes most of the connections to and from the prefrontal cortex, the anterior part of the frontal lobes of the brain, to be severed. In the past, this treatment was used for treating psychiatric disorders as a mainstream procedure in some countries. The procedure was controversial from its initial use, in part due to a lack of recognition of the severity and chronicity of severe and enduring psychiatric illnesses, so it was claimed to be an inappropriate treatment. Frontal lobe surgery, including lobotomy, is the second most common surgery for epilepsy to this day, and usually done on one side of the brain, unlike lobotomies for psychiatric disorder which were done on both sides of the brain. The originator of the procedure, Portuguese neurologist António Egas Moniz, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lobotomy
A lobotomy, or leucotomy, is a form of neurosurgical treatment for psychiatric disorder or neurological disorder (e.g. epilepsy) that involves severing connections in the brain's prefrontal cortex. The surgery causes most of the connections to and from the prefrontal cortex, the anterior part of the frontal lobes of the brain, to be severed. In the past, this treatment was used for treating psychiatric disorders as a mainstream procedure in some countries. The procedure was controversial from its initial use, in part due to a lack of recognition of the severity and chronicity of severe and enduring psychiatric illnesses, so it was claimed to be an inappropriate treatment. Frontal lobe surgery, including lobotomy, is the second most common surgery for epilepsy to this day, and usually done on one side of the brain, unlike lobotomies for psychiatric disorder which were done on both sides of the brain. The originator of the procedure, Portuguese neurologist António Egas Moniz, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lobotomy
A lobotomy, or leucotomy, is a form of neurosurgical treatment for psychiatric disorder or neurological disorder (e.g. epilepsy) that involves severing connections in the brain's prefrontal cortex. The surgery causes most of the connections to and from the prefrontal cortex, the anterior part of the frontal lobes of the brain, to be severed. In the past, this treatment was used for treating psychiatric disorders as a mainstream procedure in some countries. The procedure was controversial from its initial use, in part due to a lack of recognition of the severity and chronicity of severe and enduring psychiatric illnesses, so it was claimed to be an inappropriate treatment. Frontal lobe surgery, including lobotomy, is the second most common surgery for epilepsy to this day, and usually done on one side of the brain, unlike lobotomies for psychiatric disorder which were done on both sides of the brain. The originator of the procedure, Portuguese neurologist António Egas Moniz, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbitoclast
An orbitoclast was a surgical instrument used for performing transorbital lobotomies. Because actual ice picks were used in initial experimentation and because of continued close resemblance to ice pick shafts, the procedure was dubbed "ice pick lobotomy". History and description 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, essentially, an ice pick with some gradation marks etched onto the shaft. The operation involved placing the pick behind the eye socket of the patient and breaking through the thin layer of bone found there by applying a hammer to the end of the pick and driving the instrument into the frontal lobes. The pick would then be swung medially and laterally to separate the frontal lobes from the thalamus. In 1948, Freeman embellished the procedure by adding the deep frontal cut, an additional swing of the pick deep into the lobe which plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychosurgery
Psychosurgery, also called neurosurgery for mental disorder (NMD), 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. The first significant foray into psychosurgery in the 20th century was conducted by the Portuguese neurologist Egas Moniz who during the mid-1930s developed the operation known as leucotomy. The practice was enthusiastically taken up in the United States by the neuropsychiatrist Walter Freeman and the neurosurgeon James W. Watts who devised what became the standard prefrontal procedure and named their operative technique lobotomy, although the operation was called leucotomy in the United Kingdom. In spite of the award of the Nobel prize to Moniz in 1949, the use of psychosurgery declined during the 1950s. By the 1970s the standard Freeman-Watts type of operation was very rare, but other forms of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbitoclast
An orbitoclast was a surgical instrument used for performing transorbital lobotomies. Because actual ice picks were used in initial experimentation and because of continued close resemblance to ice pick shafts, the procedure was dubbed "ice pick lobotomy". History and description 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, essentially, an ice pick with some gradation marks etched onto the shaft. The operation involved placing the pick behind the eye socket of the patient and breaking through the thin layer of bone found there by applying a hammer to the end of the pick and driving the instrument into the frontal lobes. The pick would then be swung medially and laterally to separate the frontal lobes from the thalamus. In 1948, Freeman embellished the procedure by adding the deep frontal cut, an additional swing of the pick deep into the lobe which plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Neuroscience
From the ancient Egyptian mummifications to 18th-century scientific research on "globules" and neurons, there is evidence of neuroscience practice throughout the early periods of history. The early civilizations lacked adequate means to obtain knowledge about the human brain. Their assumptions about the inner workings of the mind, therefore, were not accurate. Early views on the function of the brain regarded it to be a form of "cranial stuffing" of sorts. In ancient Egypt, from the late Middle Kingdom onwards, in preparation for mummification, the brain was regularly removed, for it was the heart that was assumed to be the seat of intelligence. According to Herodotus, during the first step of mummification: "The most perfect practice is to extract as much of the brain as possible with an iron hook, and what the hook cannot reach is mixed with drugs." Over the next five thousand years, this view came to be reversed; the brain is now known to be the seat of intelligence, although co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neurosurgery
Neurosurgery or neurological surgery, known in common parlance as brain surgery, is the medical specialty concerned with the surgical treatment of disorders which affect any portion of the nervous system including the brain, spinal cord and peripheral nervous system. Education and context In different countries, there are different requirements for an individual to legally practice neurosurgery, and there are varying methods through which they must be educated. In most countries, neurosurgeon training requires a minimum period of seven years after graduating from medical school. United States In the United States, a neurosurgeon must generally complete four years of undergraduate education, four years of medical school, and seven years of residency (PGY-1-7). Most, but not all, residency programs have some component of basic science or clinical research. Neurosurgeons may pursue additional training in the form of a fellowship after residency, or, in some cases, as a senior resid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instruments Used In General Surgery
There are many different surgical specialties, some of which require very specific kinds of surgical instruments to perform. General surgery is a specialty focused on the abdominal contents, as well as the thyroid gland, and diseases involving skin, breasts, various soft tissues, trauma, peripheral vascular disease, hernias, and endoscopic procedures. This page is dedicated specifically to listing surgical instruments used in general surgery. Instruments can be classified in many ways - but broadly speaking, there are five kinds of instruments. # Cutting and dissecting instruments: #*Scalpels, scissors, and saws are the most traditional #*Elevators can be both cutting and lifting/retracting #*Although the term dissection is broad, energy devices such as diathermy/cautery are often used as more modern alternatives. # Grasping or holding instruments: #*Classically this included forceps and clamps predominantly #*Roughly, forceps can be divided into traumatic (tissue crushin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice-pick
The ice pick is a pointed metal tool used from the 1800s to the 1900s to break, pick or chip at ice. The design consists of a sharp metal spike attached to a wooden handle. The tool's design has been relatively unchanged since its creation. The only notable differences in the design are the material used for the handle. The handle material is usually made out of wood but can also be made from plastic or rubber. These materials can be better in terms of safety and allow the user to better grip the pick during use. History During the 1800s, ice blocks were gathered from frozen water sources and distributed to nearby homes. Ice picks were used to easily cut the blocks into smaller pieces for use. In many cases these smaller blocks were used in iceboxes. Iceboxes are similar in use to refrigerators with the major difference being that iceboxes could only stay cold for a limited time. They needed to be restocked with ice regularly to continue proper functioning. The ice pick slowly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
