Schizophrenia as a Biological Disorder
As well as the biological approaches there are physiological, psychological and environmental explanations. New theories of schizophrenia are constantly being developed each having their own advantages and disadvantages. How do we know however, which one is correct?
The biological explanation suggests that schizophrenia is produced by an unfortunate combination of genes or is due to physical problems in the brain. Researchers favouring the biological explanation look at genetic factors, brain structure and biochemical explanations.
Many researchers would suggest that the debate over whether schizophrenia is passed down through genetics is no longer a
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This can also be accounted for distant relatives who are unlikely to share the same environment.
We can therefore assume that to confirm a genetic base for schizophrenia, research must separate genetic influences from environmental influences. In order to do this, researchers must look at the evidence presented through twin studies. A set of MZ twins share the same genes, therefore if only one of the develops schizophrenia, it is more likely to be through environmental factors. If genetic factors are of prime importance then MZ twins should show a higher concordance rate than DZ twins. This is in fact the case, and MZ twins are two to four times more likely to develop schizophrenia than DZ twins. Again, a way of cutting out the environmental factor of upbringing can be seen in adoption studies. Children born from a mother with schizophrenia and separated 3 days after birth are still more likely to develop schizophrenia regardless to their split.
Studies have also been carried out to test the importance of environment itself, however very little evidence can be found. Children (non schizophrenic) were adopted by individuals that later developed schizophrenia. As the child does not share any genes with the adopted mother/father, the environment is the only point that could determine whether or not they develop schizophrenia. There were extremely low or even no
Given these facts, this research paper will address this question. I will examine the effects of schizophrenia upon adults in the US. I have presented an overview of schizophrenia, the discovery of the illness. I will explain how genetics intertwined with schizophrenia. To fully explore the topic this paper will discuss the following questions.
“As with many mental disorders, the causes of schizophrenia are poorly understood. Friends and family commonly are shocked, afraid or angry when they learn of the diagnosis. People often imagine a person with schizophrenia as being more violent or out-of-control than a person who has another kind of serious mental illness. But these kinds of prejudices and misperceptions can be readily corrected (Physical Central, 2013)”. These are just some of the common misconceptions about this tragic disease. One of the best ways to describe this disease is as a “split mind” where literally the person feels as if they are in an unrealistic world that is real to them like a hallucination. “Family, twin, and adoption studies support the role of genetic influences in schizophrenia. Immediate biological relatives of people with schizophrenia have about 10 times greater risk than that of the general population. Given prevalence estimates, this translates into a 5 to 10 percent lifetime risk for first-degree relatives (including children and
Outline and evaluate one or more biological explanations of schizophrenia (8 marks AO1/16 marks AO1)
Genetics play a role in the development of schizophrenia. When looking closer at the brain chemistry between a person with schizophrenia and a person with out schizophrenia there are
There are two main biological theories which explain the assumed causes of schizophrenia: Genetic and Dopamine Hypothesis.
However, evidence seems to disprove this theory. In some instances, both identical twins are schizophrenics and other times only one is affected. To defend this theory, it should be noted that this research is complicated. Identical twins are relatively rare, especially twins who are both diagnosed with schizophrenia. Studies have also shown that children with one parent diagnosed with schizophrenia have a ten percent chance of suffering from schizophrenia. When both parents are schizophrenic, their risk raises to approximately forty percent. Little is known about the Environmental Theory. The theory is built mainly on the effects of stress on human behavior. Most researchers agree that stress alone cannot be the main cause of schizophrenia. Most researchers agree that stress could possibly trigger or worsen the symptoms when the illness is already present. Other researchers focus on drug abuse. Like stress, certain drugs such as amphetamines can make psychotic symptoms worse if a person already has schizophrenia. Furthermore, these drugs can, in a sense, create schizophrenia. Other researchers that support the Environmental Theory believe that "slow viruses" may be to blame. Slow viruses are viral infections that go undetected for long periods of time. Signs and symptoms are delayed and may occur many years after the first infection. The Bio-Chemical Theory suggests that schizophrenia is caused
SCHIZOPHRENIA Schizophrenia, from the Greek word meaning “split mind”, is a mental disorder that causes complete fragmentation in the processes of the mind. Contrary to common belief, schizophrenia does not refer to a person with a split personality or multiple personalities, but rather to a condition which affects the person’s movement, language, and thinking skills. The question of whether schizophrenia is a disease or collection of socially learned actions is still a question in people’ mind. People who are suffering from schizophrenia think and act in their own the world and put themselves in a way that is totally different from the rest of society. In other words, they have lost in touch with the reality. Most schizophrenics accept
The term schizophrenia' covers a group of serious psychotic disorders characterised by a loss of contact with reality. It comes from two Greek words: schiz meaning split' and phren meaning mind'. DSM IV (1994) estimate that the occurrence rate of schizophrenia ranges from 0.2%-2.0% worldwide. There are two main explanations of schizophrenia: the biological explanations and the psychological explanations. In this essay I will critically consider the biological explanations. These include genetics, neurochemistry, brain structure and evolution.
.(3) Schizophrenia is often present in familial clusters. Monozygotic twins have an even slightly higher concordance rate. It has been found through studies that adoptive parents do not have any effect upon children in relation to developing the disease, which is also another strong biological marker. The risk factor of children with parents suffering from the disease rises from one percent to twelve percent . Another finding that backs up the biological basis claim is that lower levels of platelet monomania oxidase B are found in people suffering from chronic schizophrenia. Higher levels in the cerebral spinal fluid of these monoamine metabolites, HVA, and 5HIAA are found in people with a family history of schizophrenia as opposed to people without the genetic predisposition afflicted with the disease. .(4) These varying levels result in varying biochemical changes that are predetermined and passed through families.
Schizophrenia is a psychotic disorder characterized by distorted thinking, impaired emotional responses, poor interpersonal skills and a distortion of reality. It is the most common of psychotic disorders that, in most countries around the world, affects around 1 per cent of the population. In terms of explanations for the disorder, two central types of explanations arise – psychological explanations and biological explanations. Whereas psychological explanations tend to focus on cognitive, emotional and environmental factors that may cause the disorder, biological explanations tend to focus on genetic, biochemical and neuro-anatomical factors as the cause of the
Schizophrenia is a chronic brain disorder that changes the way certain people interpret reality. (Schizophrenia) Around the world, in the general population a normal person only has about a 1% chance of developing this disease in their lifetime. It can however be passed along genetically. Say a second degree relative i.e. aunt/uncle, grandmother/grandfather or cousin is schizophrenic, you have a 5% chance of becoming schizophrenic sometime in your life. If your mother or father is a schizophrenic, your chances go up to 12%. If your brother or sister have the illness your chances rise to 8% but if you are the fraternal twin to a schizophrenic, your chances of becoming one are about 14%. If both parents are schizophrenic you now have a 39% chance but if you are the identical twin of a schizophrenic your chances of
Biological, psychological, and sociocultural viewpoints have been developed in an attempt to explain schizophrenia. All three viewpoints point out various factors that may contribute to the development of the disorder.
Schizophrenia can be passed down thru generations even though there is not a specific gene associated with the disorder. It is considered to be a combination of genes that make a person susceptible to becoming schizophrenic. This information is found mainly thought the study of twins. By having the same genes it can be viewed why genes contribute to the potential of schizophrenia. Even though genetics is a viable factor in the analysis of the cause of schizophrenia there are more supporting factors found in neurotransmitters.
This essay will discuss whether schizophrenia is genetically inherited disorder. There will be an understanding to what schizophrenia is with a brief description in the introduction. This essay will also talk about weather schizophrenia is genetically inherited or weather it is a biological (Inherited) disorder. It will also include weather schizophrenia is cause by other factors such as social factors, environmental, pre natal, childhood and neurobiology. The essay will also state weather schizophrenia is caused by a combination of the two.
Conclusions / Results: Conclusions suggest that the nature vs nurture dichotomy may not be as relevant as looking at the interaction between these two forces. It was discovered that while one’s genetic heritage creates a predisposition towards schizophrenia, other factors such as the home environment, the parental environment, dietary factors and others may determine whether the disease is manifested.