Etiological Factors Of Schizophrenia

There are two main biological theories which explain the assumed causes of schizophrenia: Genetic and Dopamine Hypothesis.

Outline and evaluate one or more biological explanations of schizophrenia (8 marks AO1/16 marks AO1)

A Comparison of Biological and Psychological Explanations of Schizophrenia Both the biological and the psychological explanations of schizophrenia are supported by empirical evidence which justify their explanations. However ,within the biological explanation there is the genetic explanation which is used largely based on scientific research such as that of Gottesman’s research using meta-analysis which looked at the family (including twin) relationships and concordance rates of schizophrenia. The studies used Gottesman’s research was scientifically based and because of the large number of studies and therefore the sample used, the biological research can be credited for being representative.

A number of factors have been linked to schizophrenia:genetics, psychological vulnerability, and poor environmental surroundings. The understanding the of this mental illness is called

Not every person with schizophrenia will have all symptoms, and the symptoms of schizophrenia may change over time.” (Schizophrenia: Sings, Types & Causes, Authors: Melinda Smith, M.A., and Jeanne Segal, Ph. D., Last Update February 2014, http://www.helpguide.org/mental/schizophrenia_symptom.htm) It is believed that no one single gene causes schizophrenia it is said that more than one gene is the cause of increased risk of schizophrenia there is a greater risk of a child developing it. There is more to this story than genetics; some type of early childhood trauma may play a role in schizophrenia. (The Causes of Schizophrenia http://www.nami.org/content/navigationmenu/mental_illnesses) The onset of schizophrenia occurs between the age of 15 and 45 in males, it is more common in males than females. There is talk from researchers about children with schizophrenia also having other mental disorders which include ADHD, ADD and bipolar disorder. Although there is not a tremendous amount of research they also believe that most children have had someone in their family who has been in a psychiatric hospital at some point and a family history of schizophrenia and some type of trauma. There is also a high number of suicide attempts in children with schizophrenia, there is also research to show that there is an increase of odds of schizophrenia in African Americans and Hispanic youth, however it is also very easy to misdiagnose these

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

Biological theorists believe that individuals may have a genetic predisposition for the schizophrenia if a close family member has been diagnosed with the disorder. Stress during adolescent years seems to provoke the disorder among individuals who have a family history of the disorder. In addition, this theory suggests biochemical abnormalities related to the dopamine neurotransmitters may also contribute to the illness as the brains neurotransmission of the dopamine is too frequent in occurrence (Comer, 2005). CAT and MRI scans have also indicated that abnormal brain structuring may also play a role in the development of schizophrenia due to a common occurrence of enlarged ventricles within schizophrenia sufferers (Comer, 2005). Various parts of the brain may not develop for function properly which seems lead to Type II schizophrenia. Studies have also pointed towards the idea that exposure to certain viruses before birth may lead to the eventual development of schizophrenia (Comer, 2005).

No one really knows how schizophrenia is caused, but it can be seen that both environmental and genetic risks are factors in the development. The environment risks are the over use of marijuana, (add more thingy’s). The genetic risks of schizophrenia are the issues within growth during a pregnancy, brain chemistry and structure, passing of the schizophrenic gene from one generation to the next generation, (more thingy’s). As you can see in figure one both environmental and genetic factors work together in this unfortunate development.

Schizophrenia is a neurodevelopmental condition that has unclear etiology. Current research indicates that the condition is caused by numerous causes, including genetic predisposition and environmental factors. Genetics is indicated as the etiology for many individuals who develop the condition. However more research is indicated in order to understand how environmental factors contribute to the development of schizophrenia. Specifically, how factors such as infection influence the developing brain and whether or not an individual’s immune response adversely affects neurodevelopment.

In this essay I will try to explain schizophrenia and talk about the main biological and psychological explanations, also showing how similar and different they are. Schizophrenia is defined in the oxford dictionary as 'a long-term mental disorder of a type involving a breakdown in the relation between thought, emotion, and behaviour, leading to faulty perception, inappropriate actions and feelings, withdrawal from reality and personal relationships into fantasy and delusion, and a sense of mental fragmentation. '1 schizophrenia has positive and negative symptoms, the positive being delusions, hallucinations and disordered thoughts whereas negative symptoms consist of expressionless faces, poverty of speech and lack of motivation.2 The

Schizophrenia is a very serious, long-term disorder that affects about 1% of the world’s population. It affects people anywhere from twenty years old, to forty-five years old. It is known to be one of the most disabling diseases in this age group. Schizophrenia can break down a person’s behaviors, emotions, and thoughts. People who suffer from schizophrenia usually show very inappropriate displays of their actions and feelings. Sufferers have been known to hear voices, even when there is nobody around them. They have problems controlling their thoughts, and sometimes blurt out things that are very inappropriate. This paper will outline the biological, social, and psychological

Environmental factors are crucial to the development of schizophrenia. A traumatic experience in early childhood can cause schizophrenia in the future for example sexual or physical abuse. It carries over to adulthood. According to some studies, the age of the father contributes to the risk of schizophrenia. The older the father the greater the risk because of the “genetic mutation in the sperm that can be passed on.” (Berkshire Health System, 2014)

Schizophrenia is characterized by delusions thinking and hallucinations. Schizophrenia affects more than two million Americans. The researchers pieced together the steps by which genes can increased a person risk of developing schizophrenia. This relates to the Biopsychology class because the causes of schizophrenia have two factors, the first factor that play a major role is the risk that the researchers found is the natural process called synaptic pruning. The brain sheds weak or redundant connections between neurons as it matures. During adolescence and early adulthood, this activity take place in the prefrontal cortex. The prefrontal cortex is a section of the brain where thinking and planning take place.

There are many causes to Schizophrenia. Many causes are genetics, brain chemistry and structure, and the environment of a human being. Genetically Schizophrenia can run through a family and can be passed on generations at a time. “Individuals with a first degree relative (parent or sibling) who has schizophrenia have a 10 percent chance of developing the disorder, as opposed to the 1 percent chance of the general population.” (Helpguide.org) Identical twins are a good example of this. “If an identical twin is diagnosed with Schizophrenia the other twin is 50 percent more likely to also be diagnosed with the mental disorder (psychcentral.com).” Brain chemistry and structure is another big factor in the cause of Schizophrenia. Neurotransmitters-

Even with all the criteria for Schizophrenia that I described above, still there is no apparent reason as to what the risk factor of Schizophrenia is. Which lead to my research to indentify certain certain Risk factors associated with with Schizophrenia. During my research, I was able to discover many risks factors, but I chose to only discuss the few that are very common through most