Where does Schizophrenia Lie in the Spectrum of Nature vs Nurture?

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Where does Schizophrenia lie in the spectrum of Nature versus Nurture?

Saria Chatila

American International School – Riyadh

May 2013

Extended Essay

Word Count: 3054 words

Candidate Number: ____________________

Schizophrenia and Nature versus Nurture

Abstract

To begin, my research question is ‘Where does Schizophrenia lie in the spectrum of Nature versus Nurture?’ Nature versus Nurture is an ongoing debate discussing whether the environment determines one’s behavior they are surrounded by or by the genes they inherit. My research question is more focused on how Schizophrenia is developed. Does one’s genes determine it, or does the environment play a role? I went about researching by using the Internet and found articles, videos, theories, and stories. Additionally, I interviewed Marwan Chatila (my father), because his brother is being diagnosed with Schizophrenia. After doing some research, I have found that each person has 46 chromosomes, and each of their genes are located on 23 chromosomes. Each person inherits two copies of each gene, from each parent. Several genes could be associated with a risk of schizophrenia depending on whether each parent has a relative who has schizophrenia. Genetic contributions could include having first or second-degree relatives, which could increase one’s risk of developing Schizophrenia. There are several environmental contributions many of which include the exposure to viruses, stressful environmental conditions, malnutrition in the womb, and early parent loss or separation. Therefore, I have come with the conclusion that one can have genes that may play a role in the development of Schizophrenia however it is not possible to predict how it is developed by looking at a person’s genes. The genes may cause a risk, however they are unlikely to cause the disease on their own. Thus, they associate with environmental factors that trigger schizophrenia.

 

Word Count: 258

Table of Contents:

Introduction to Schizophrenia………………………………………......4

Types of Schizophrenia………………………………………………....5

Schizophrenia Symptoms…………………………………………….....6

Schizophrenia Phases……………………………………………….......7

Case of Schizophrenia…………………………………………………..9

Genetic Factors…………………………………………………………11

Environmental Factors………………………………………………….12

Schizophrenia Cures……………………………………………………13

Conclusion……………………………………………………………...15

Bibliography……………………………………………………………17

Introduction

Schizophrenia (from the Greek roots skizein (“to split”) and phren, phren- (“mind”)) is a mental disorder that was first recognized by a doctor named Emile Kraepelin in 1887. It was believed that it accompanied mankind long before it was first identified. It is characterized by a variety of symptoms many of which include the loss of contact with reality, hallucinations, and odd behavior. Patients who have schizophrenia are often misinterpreted as people who have a multiple personality, however it is actually a deterioration of personality. A Swiss Doctor named Eugen Bleuler closely observed schizophrenia in 1908 (The History of Schizophrenia). Furthermore, both doctors subdivided schizophrenia into different categories, which include disorganized, catatonic, paranoid, residual, and undifferentiated. They were classified based on “positive” and “negative” symptoms. By doing this, it was hoped that they would be able to determine the causes of this mental illness.

        About 1% of the population worldwide is diagnosed with schizophrenia, and 1.2% of Americans (3.2 million) have the disorder. Additionally, 1.5 million people are going to be diagnosed with schizophrenia this year around the world. In the United States, this means that approximately 100,000 people will be diagnosed, which means that 7.2 people per 1,000 or about 21,000 people within a city of 3 million who are likely to be suffering from schizophrenia (Statistics of Schizophrenia, Symptoms & Patterns of Schizophrenia). Although it is not a tremendously common disease, it is a serious one that affects people throughout their life.

Types of Schizophrenia

The five different subtypes of schizophrenia include undifferentiated, paranoid, catatonic, disorganized, and residual schizophrenia. Firstly, Undifferentiated Schizophrenia is one of the main types of schizophrenia. The symptoms that are evident in this type of schizophrenia are incoherent speech, disorganized behavior, complex delusions, and hallucinations. Secondly, paranoid schizophrenia involves “hallucinations involving paranoid ideation” as well as delusions. Common types of delusions that are evident in paranoid schizophrenia are the Delusion of Persecution, the Delusion of Jealousy, the Delusion of Grandeur, and the Delusion of Reference. Catatonic schizophrenia is one of the major types of schizophrenia. The symptoms that contribute to this type of schizophrenia are firm and excitable motor behavior (How Does Nature and Nurture Contribute to Schizophrenia? ). Disorganized Schizophrenia is identified when a person has disorganized speech, thinking and when someone’s behavior is silly and or when the person is withdrawn socially. Residual Schizophrenia is when a person has had at least one schizophrenic episode but does not necessarily have symptoms such as delusions and hallucinations. They may have negative symptoms however, that include being withdrawn from others (Undifferentiated Schizophrenia).

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Schizophrenia Symptoms

As mentioned above, there are five different subtypes of schizophrenia and each of them has different symptoms and risk factors. Furthermore, all the symptoms associated with schizophrenia fall into two categories, positive symptoms and negative symptoms. Positive symptoms are symptoms, which are sometimes referred to as psychotic symptoms. They appear in a schizophrenic’s daily life. Delusions, hallucinations, and confused thoughts are examples of different positive symptoms and they are all associated with one’s brain.

A delusion is a belief that is held with complete certainty despite the fact that it is based on an unrealistic view. ...

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