Thesis on "Biological Basis of Schizophrenia"

Thesis 10 pages (2888 words) Sources: 10 Style: APA

[EXCERPT] . . . .

Patho-Physiological Condition of Schizophrenia

Searching for the precursors to schizophrenia is like searching through the ashes of a burned home looking for the clues as to the single tiny light on the Christmas tree that ignited it, starting the fire that burned the house down. Schizophrenia is a pathophysiological condition, which remains largely a dark secret to the individual suffering the disease, the family and friends who try to accept and understand it, and to the medical community providing the support in treatment and care to the patients diagnosed with the disease.

Often times an individual's history has no sign of trauma, or other events that mental health workers often look for when trying to understand a patient's condition in order to design a treatment plan that addresses that condition (Hienrichs, R. Walter, 2001, p. 4). Where does the therapist look, then, to understand the pathophysiological condition? R. Walter Heinrichs (2001) writes that schizophrenia is a disease of ideas, emotions, ultimate privacy, and the annihilation of privacy (p. 21).

It is an illness where everyday meanings gather gently, insistently, into fantastic convictions, or rage abruptly into storms of secret logic no mind can understand. It is an illness of extreme imagination and the collapse of imagination; of power and prejudice, ambition, and apathy (p. 21)."

Heinrichs describe the condition in such poetic and elegant terms that it almost erases the horror of what is later described, or the terror that grips the mind of the patient in the throngs of mental anguish and torment as they are convinced that their bodies have been invaded by parasites that control their thoughts and actions (p. 21). Schizophrenia is disease, the origins of which must be pieced together, and often is elusive as to exactly what experiences or events in life might trigger the condition.

The Path of Schizophrenia

In some circles, experts continue to debate whether or not schizophrenia is a biological disease, or a psychological problem. The many aspects of psychosis that manifest in patients diagnosed with schizophrenia would suggest that it is a biological problem (Harrop, Chris and Trower, Peter, 2003, p. 13). Research on schizophrenia has led to three recurring conclusions about the disease:

Stress is involved in the onset and relapse

Dopamine-based medications can be therapeutically useful

The condition most often manifests itself in late adolescence (Harrop and Trower, p. 33).

It is the dopamine-based medication to which patients respond in a positive way that is the basis for the argument that schizophrenia is a biological condition, not a psychological one. Condition three is actually a swing factor, and it could go in support of either argument, for or against the biological argument for the disease. Therefore, the argument that it is a biological condition must rule out, or mitigate conclusion three in order to substantiate the biological basis as the condition. The easiest way, of course, to prove that the disease is biological in nature would be to find a link between the disease and the genetic code.

Dr. Fuller Torrey, M.D. (1994), examined the biological roots for schizophrenia. Torrey cites the study of twins in arriving at conclusions as to the biological basis for the disease (1994). At the end of the 19th century, Torrey writes, twins became the tool for scientific research to understand genetics in relationship to disease (p. 3). Oddly, and sadly enough the first focus on twins and disease came out of Hitler's Germany, and was in connection with the ongoing quest for German genetic perfection, and to eliminate hereditary disease from the German genetics (p. 3). Researchers believed that epilepsy, alcoholism, mental retardation, and schizophrenia were each conditions that were genetically transferred from one generation to the next.

Twin research flourished in Nazi Germany. Such studies offered the most convincing means for proving that a given condition was "genetic" in origin and therefore a candidate for compulsory sterilization. The most common form of the twin research was to compare the concordance rate of a disease in identical (monozygotic) twins with the concordance rate in fraternal (dizygotic) twins -- in other words, to answer the question of how often when one twin is affected with the disease is the other twin also affected. If 100% of second twins in identical pairs but only 10% of second twins in fraternal pairs get the disease, that would constitute strong evidence for a genetic origin. Establishing the relative concordance rates for various physical and mental diseases in identical and fraternal twins became a high priority in 1930s Germany (Torrey, p. 4)."

The horrifying racist and murderous German approach to the study of twins under the Third Reich is unforgivable. It is the reason that in the decades following World War II, little research was approached using twins as the basis for study until recently.

For half a century the shadow of Josef Mengele has hung heavily over twin research. In Germany it is said that "Germans have an abiding and understandable fear of anything to do with genetic research" (Specter, 1990). Thomas Bouchard, a psychologist who has helped direct the study at the University of Minnesota of identical twins who were raised apart, recently commented that "there are colleagues who think I'm a racist, sexist, fascist pig" (Aldous, 1992). In 1988 the senior author of the present study was publicly called "a new Mengele" by a psychiatrist at a national conference (Breggin, 1988). For a few people it seems that anybody who studies twins is automatically assumed to be a fascist or worse (Torrey, p. 5)."

The need to better understand genetically hereditary diseases like diabetes, Alzheimers, and some forms of cancer has made the research involving twins less objectionable today. It has served to expedite the understanding of genetics and human genome projects towards success in ways that could not have been accomplished but for the participation of twins in the studies. Obviously, unlike those conducted in Nazi Germany, today's participants are willing ones, with a personal or social interest in contributing to studies that lead to the eradication of diseases.

Benjamin Rush, the father of American psychiatry, was among the first to recognize the psychiatric research potential of twins. Commenting in 1812 on a pair of identical twins both of whom had suicided, Rush observed the "hereditary sameness of organization of the nerves, brain and blood ves sels on which... The predisposition to madness dwells" (Price, 1978) (Torrey, pp. 5-6)."

Working in a German psychiatric clinic, Hans Luxenburger began his studies of twins and schizophrenia in 1920 (Torrey, p. 6). Luxenburger found that 58% of identical twins studied had higher concordance for schizophrenia than did fraternal twins, which manifested zero percent (Torrey, p. 6). Franz Kallman conducted studies in 1935 using twins to study schizophrenia (p. 6). His studies were interrupted by Hitler's Third Reich, and, because his father was Jewish, Kallman was forced to leave Germany, and he immigrated to America, where, in New York City, he continued his research using twins and records from a New York psychiatric hospital (p. 6). Kallman's studies supported Luxenburger's research, finding that the number of identical twins with schizophrenic episodes was greater than that of fraternal twins (p. 6).

In many of the pairs in which only one twin had developed schizophrenia, Kallmann noted that the twins were young and so there was still time for the second twin to develop the disease. He therefore corrected for this age factor and reported concordance rates of 86% for identical twins and only 15% for fraternal twins. According to Kallmann, such figures proved that schizophrenia is caused by a recessive gene. Since no other twin researcher has reported concordance rates close to those of Kallmann's, the methodology of his research has been the subject of spirited debate among both detractors (Lewontin et al., 1984, pp. 207-213) and defenders (Shields et al., 1967) (Torrey, p. 6)."

Kallmann's studies have been challenged, because of issues with the methodology (p. 6). Four other earlier studies that relied upon hospital records alone were also challenged. Subsequent studies, however, have been done on twins with schizophrenia (p. 7). Many of the studies conducted were thorough, using modern technology to ensure no challenges could be raised. The twins studied were examined by the researcher personally, and blood tests were taken to prove the identical relationship, and the twins were fingerprinted (p. 7).

Between 1963 and 1973 three Scandinavian schizophrenia twin studies were carried out and were, in terms of sampling methodology, the best studies ever conducted, using national twin registries, which were maintained in Scandinavian countries for every twin born in each country. Such registries could be compared with psychiatric records to identify virtually every twin who had ever been treated psychiatrically. Pekka Tienari (1963, 1975) worked in Finland, Einar Kringlen (1967) in Norway, and Margit Fischer (1973) in Denmark. Kringlen interviewed all his twins and followed them for many years. Tienari also interviewed most of his twins, but one third of Fischer's twins had died prior to her study so… READ MORE

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