1.brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems
1.(MeSH)Treatment of chronic, severe and intractable psychiatric disorders by surgical removal or interruption of certain areas or pathways in the brain, especially in the prefrontal lobes.
definition of Wikipedia
Psychosurgery (n.) [MeSH]
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 twentieth century was conducted by the Portuguese neurologist Egas Moniz. During the mid-1930s he developed the operation known as leucotomy. The practice was enthusiastically taken up in America 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. After World War II, Freeman broke with Watts and introduced a modification of the procedure which he termed transorbital lobotomy. This simplified procedure where an ice-pick or similar instrument entered the brain through the eye socket dispensed with the need for a neurosurgeon and became subject to widespread use in America. In spite of the award of the Nobel prize to Moniz in 1949 the lobotomy was largely discredited and replaced by chlorpromazine in the 1950s. Other forms of psychosurgery, although used on a much smaller scale, survived. Some countries have abandoned psychosurgery altogether; in others, for example the US and the UK, it is regulated and only used in a few centres on small numbers of people with depression or obsessive-compulsive disorder (OCD) who have already undergone years of treatment. In some other countries it is used in the treatment of schizophrenia and addiction.
Psychosurgery is a collaboration between psychiatrists and neurosurgeons. During the operation, which is carried out under a general anaesthetic and using stereotactic methods, a small piece of brain is destroyed or removed. The most common types of psychosurgery in current or recent use are capsulotomy, cingulotomy, subcaudate tractotomy and limbic leucotomy. Lesions are made by radiation, thermo-coagulation, freezing or cutting. About a third of patients show significant improvement in their symptoms after operation. Advances in surgical technique have greatly reduced the incidence of death and serious damage from psychosurgery; the remaining risks include seizures, incontinence, decreased drive and initiative, weight gain, and cognitive and affective problems.
Currently, interest in the neurosurgical treatment of mental illness is shifting from ablative psychosurgery (where the aim is to destroy brain tissue) to deep brain stimulation (DBS) where the aim is to stimulate areas of the brain with implanted electrodes.
There is evidence that trepanning (or trephining) — the practice of drilling holes in the skull — has been in widespread, if infrequent, use since 5000 BC. This may have been done in an attempt to allow the brain to expand in the case of increased brain fluid pressure, for example, after head injuries. However, psychosurgery as understood today was not commonly practiced until the 1930s.
The first systematic attempt at human psychosurgery is commonly attributed to the Swiss psychiatrist Gottlieb Burckhardt. In December 1888 Burckhardt operated on the brains of six patients (one of whom died a few days after the operation) at the Préfargier Asylum, cutting out a piece of cerebral cortex. He presented the results at the Berlin Medical Congress and published a report, but the response was hostile and he did no further operations. Early in the 20th century Russian neurologist Vladimir Bekhterev and Estonian neurosurgeon Ludvig Puusepp operated on three patients with mental illness, with discouraging results.
But it was the Portuguese neurologist Egas Moniz who, in 1935, was responsible for introducing psychosurgery into mainstream psychiatric practice, and coined the term "psychosurgery". Moniz developed a theory that people with mental illnesses, particularly "obsessive and melancholic cases" had a disorder of the synapses which allowed unhealthy thoughts to circulate continuously in their brains. Moniz hoped that by surgically interrupting pathways in their brain he could encourage new healthier synaptic connections. In November 1935, under Moniz's direction, surgeon Pedro Almeida Lima drilled a series of holes on either side of a woman's skull and injected ethanol to destroy small areas of subcortical white matter in the frontal lobes. After a few operations using ethanol, Moniz and Almeida Lima changed their technique and cut out small cores of brain tissue. They designed an instrument which they called a leucotome, and called the operation a leucotomy (cutting of the white matter). After twenty operations they published an account of their work. The reception was generally not friendly but a few psychiatrists, notably in Italy and the US, were inspired to experiment for themselves.
In the US, psychosurgery was taken up and zealously promoted by neurologist Walter Freeman and neurosurgeon James Watts. They started a psychosurgery program at George Washington University in 1936, first using Moniz's method but then devised a method of their own in which the connections between the prefrontal lobes and deeper structures in the brain were severed by making a sweeping cut through a burr hole on either side of the skull. They called their new operation a lobotomy.
Freeman went on to develop a new form of lobotomy which dispensed with the need for a neurosurgeon. He hammered an ice pick-like instrument, an orbitoclast, through the eye socket and swept through the frontal lobes. The transorbital or "ice pick" lobotomy was done under local anesthesia or using electroconvulsive therapy to render the patient unconscious and could be performed in mental hospitals lacking surgical facilities. Such was Freeman's zeal that he began to travel around the nation in his own personal van, which he called his "lobotomobile", demonstrating the procedure in psychiatic hospitals. Freeman's patients included 19 children, one of whom was 4 years old.
The 1940s saw a rapid expansion of psychosurgery, in spite of the fact that it involved a significant risk of death and severe personality changes. By the end of the decade, up to 5000 psychosurgical operations were being carried out annually in the US. In 1949, Moniz was awarded the Nobel Prize for Physiology or Medicine. But psychosurgery went into rapid decline in the 1950s, due to the introduction of new drugs and a growing awareness of the long-term damage caused by the operations, as well as doubts about its efficacy.
Beginning in the 1940s various new techniques were designed in the hope of reducing the adverse effects of the operation; William Beecher Scoville's orbital undercutting, Jean Talairach's anterior capsulotomy, and Hugh Cairn's bilateral cingulotomy. Stereotactic techniques made it possible to place lesions more accurately, and experiments were done with alternatives to cutting instruments such as radiation. By the 1970s the standard or transorbital lobotomy had been replaced with other forms of psychosurgical operations.
During the 1960s and 1970s psychosurgery became the subject of increasing public concern and debate, culminating in the US with congressional hearings. Surprisingly, the National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research in 1977 endorsed the continued limited use of psychosurgical procedures. In this new, regulated era, a few facilities in some countries, such as the US, continue to use psychosurgery on small numbers of patients, with the number of operations declining further over the 30 years, a period during which there have been no major advances in ablative psychosurgery.
The frontal lobe of the brain controls a number of advanced cognitive functions, as well as motor control. Motor control is located at the rear of the frontal lobe, and is usually unaffected by psychosurgery. The anterior or prefrontal area is involved in impulse control, judgement with everyday life and situations, language, memory, motor function, problem solving, sexual behaviour, socialization and spontaneity. Frontal lobes assist in planning, coordinating, controlling and executing behaviour.
All the forms of psychosurgery in use today (or used in recent years) target the limbic system, which involves structures such as the amygdala, hippocampus, certain thalamic and hypothalamic nuclei, prefrontal and orbitofrontal cortex, and cingulate gyrus — all connected by fibre pathways and thought to play a part in the regulation of emotion. There is no international consensus on the best target site.
Anterior cingulotomy was first used by Hugh Cairns in the UK, and developed in the US by H.T. Ballantine jnr. In recent decades it has been the most commonly used psychosurgical procedure in the US. The target site is the anterior cingulate cortex; the operation disconnects the thalamic and posterior frontal regions and damages the anterior cingulate region.
Anterior capsulotomy was developed in Sweden, where it became the most frequently used procedure. It is also used in Scotland. The aim of the operation is to disconnect the orbitofrontal cortex and thalamic nuclei.
Subcaudate tractotomy was the most commonly used form of psychosurgery in the UK from the 1960s to the 1990s. It targets the lower medial quadrant of the frontal lobes, severing connections between the limbic system and supra-orbital part of the frontal lobe.
Endoscopic sympathetic block (a form of endoscopic thoracic sympathectomy) for patients with anxiety disorder is sometimes considered to be a psychiatric treatment, despite it not being surgery of the brain. There is also renewed interest in using it to treat schizophrenia. ESB disrupts brain regulation of many organs normally affected by emotion, such as the heart and blood vessels. A large study demonstrated significant reduction in "alertness" and "fear" in patients with social phobia as well as improvement in their quality of life.
In China psychosurgical operations which make a lesion in the nucleus accumbens are used in the treatment of drug and alcohol dependence. Psychosurgery is also used in the treatment of schizophrenia, depression, and other mental disorders. Psychosurgery is not regulated in China, and its use has been criticised in the West.
India had an extensive psychosurgery programme until the 1980s, using it to treat addiction, and aggressive behaviour in adults and children, as well as for depression and OCD. Cingulotomy and capsulotomy for depression and OCD continue to be used, for example at the BSES MG Hospital in Mumbai.
In Japan the first lobotomy was performed in 1939 and the operation was used extensively in mental hospitals. However, psychosurgery fell into disrepute in the 1970s, partly due to its use on children with behavioural problems.
In the 1980s there were 10-20 operations a year in Australia and New Zealand. The number had decreased to one or two a year by the 1990s. According to one report, no operations have been carried out since 2000, although the Victorian Psychosurgery Review Board dealt with 3 applications between 2006 and 2008.
In the twenty year period 1971-1991 the Committee on Psychosurgery in the Netherlands and Belgium oversaw 79 operations. Since 2000 there has been only one centre in Belgium performing psychosurgery, carrying out about 8 or 9 operations a year (some capsulotomies and some DBS), mostly for OCD.
In the early 2000s in Spain about 24 psychosurgical operations (capsulotomy, cingulotomy, subcaudate tractotomy, and hypothalamotomy) a year were being performed. OCD was the most common diagnosis, but psychosurgery was also being used in the treatment of anxiety and schizophrenia, and other disorders.
In the UK between the late 1990s and 2010 there were just two centres using psychosurgery: a few stereotactic anterior capsulotomies are performed every year at the University Hospital of Wales, Cardiff, while anterior cingulotomies are carried out by the Advanced Interventions Service at Ninewells Hospital, Dundee. The patients have diagnoses of depression, obsessive-compulsive disorder, and anxiety. Ablative psychosurgery was not performed in England between the late 1990s and 2010, although a couple of hospitals have been experimenting with DBS. In 2010 Frenchay Hospital, Bristol, performed an anterior cingulotomy on a woman who had previously undergone DBS.
In Russia in 1998 the Institute of the Human Brain (Russian Academy of Sciences) started a programme of stereotactic cingulotomy for the treatment of drug addiction. About 85 people, all under the age of 35, were operated on annually. In the former USSR, leucotomies were used for the treatment of schizophrenia in the 1940s, but the practice was prohibited by the Ministry of Health in 1950.
In the US the Massachusetts General Hospital has a psychosurgery program. Operations are also performed at a few other centres. In Mexico psychosurgery is used in the treatment of anorexia, and in the treatment of aggression.
Venezuela has three centres performing psychosurgery. Capsulotomies, cingulotomies and amygdalotomies are used to treat OCD and aggression.
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