This paper reviews the biopsychosocial model as a framework for understanding schizophrenia, examining evidence for brain localization, genetic vulnerability, and environmental stressors in the condition's etiology. The biopsychosocial perspective integrates biological characteristics with psychological and social factors, offering clinicians a comprehensive approach to diagnosis and treatment. While some researchers view schizophrenia as an incurable brain disease, most Western practitioners recognize it as a treatable condition combining pharmacological and psychosocial interventions. The paper synthesizes peer-reviewed literature to demonstrate that the biopsychosocial model provides an evidence-based framework superior to purely biological or purely social interpretations alone.
Schizophrenia can be a debilitating condition that adversely affects the quality of life of sufferers and their families. Although clinicians in some parts of the world view schizophrenia as an incurable brain disease, most practitioners in the Western world view the condition as having a genetic or organic basis that can be successfully treated with prescription medications and psychosocial interventions. This paper reviews the relevant peer-reviewed and scholarly literature concerning schizophrenia using a biopsychosocial model, including evidence supporting brain localization for schizophrenia, genetic factors in the onset of this disorder, and an evaluation of environmental factors.
Some researchers have suggested that schizophrenia is a disease of the brain that is common to all human societies and that it is a chronic condition without a cure (Saleeby, 2001). Other researchers, however, maintain that the condition is a cultural product that can have significant positive effects. As Saleeby emphasizes, "In some cultures, schizophrenia is regarded as bringing uncommon insight and power [and] as a connection to a supernatural world, or a temporary alteration of the senses and consciousness that brings with it special acumen into the very nature of things" (p. 54). From a biopsychosocial perspective, schizophrenia exists somewhere along a continuum between these two extremes. Grover and Davuluri (2014) report that a biopsychosocial view of schizophrenia is that it is "often a chronic, disabling condition, associated with impairments in multiple domains of functioning" (p. 119).
Researchers have developed a growing body of evidence regarding brain localization for schizophrenia. For example, a study by Posner, Peterson, and Fox (2009) noted that the selective attention deficits characteristic of schizophrenia may be due to localization of cognitive functions affected by the condition. These researchers emphasize that more research in this area is needed to confirm these findings (Posner et al., 2009). Likewise, Fujii and Ahmed (2009) report that, "Although there is general consistency in the localization literature of schizophrenia-like psychosis, contradictory findings also exist" (p. 714). There appears to be a preponderance of evidence based on functional and structural brain-imaging research that indicates schizophrenia is associated with localization in the temporal and frontal systems at both the gross neuronal and anatomical levels (Fujii & Ahmed, 2009).
Although there are organic sources of schizophrenia, there are also genetic sources that can increase an individual's risk of developing the condition. Farmer and Pandurangi (1999) explain that the vulnerability-stress model holds that rather than inheriting the disease itself, individuals inherit a vulnerability for schizophrenia. The genetic predisposition for schizophrenia places some individuals at much higher risk of developing a clinical case of the condition. Farmer and Pandurangi conclude that, "Vulnerability, in combination with relevant stressors, leads to the development of symptoms of schizophrenia" (1999, p. 112). In sum, the biopsychosocial model provides a comprehensive view of schizophrenia that takes into account a wide range of factors contributing to the condition's prevalence in individuals and populations. As Farmer and Pandurangi emphasize, "This perspective integrates biological characteristics with psychological and social aspects of human behavior, providing a biopsychosocial understanding of the variables that lead to a schizophrenic illness" (1999, p. 112).
The biopsychosocial model takes into account environmental factors that may exacerbate schizophrenia. Bemak and Epp (2007) report that, "Schizophrenia as a biopsychological model goes beyond current biological etiology and considers psychosocial stressors that exacerbate this condition" (p. 14). Based on their analysis of environmental stressors and schizophrenia, Bemak and Epp found that high levels of dopamine may exacerbate schizophrenia due to its incitement of psychological stress. This process results in what these researchers term "loosened thought" that "contributes to the mind-body interaction and, at times, creative processes" (p. 15). This finding is highly congruent with the view of schizophrenia being an enabling condition in some cases. Irrespective of the pharmacological intervention used, Bemak and Epp conclude that, "Psychotherapeutic interventions are considered indispensable to the treatment of schizophrenia" (2007, p. 19).
Likewise, Farmer and Pandurangi (1999) cite the usefulness of the biopsychosocial model in developing a more informed understanding of schizophrenia's etiology in ways that can help practitioners develop effective interventions. They emphasize that, "In the area of major mental illness, specifically schizophrenia, excluding biological or neurological factors from research is a liability for research and clinical efforts because schizophrenia is such a complex biopsychosocial phenomenon" (1999, p. 110). Because schizophrenia can be a debilitating condition if left untreated, recognizing the multifaceted nature of the disease represents an important part of diagnosis and treatment.
"Critiques and missing treatment elements"
Notwithstanding this constraint, the biopsychosocial model demonstrates its value in addressing the complex etiology of schizophrenia. Research continues to support the integration of biological research with psychological and social understanding, allowing clinicians to develop more nuanced and effective treatment strategies that address the multiple dimensions of the condition.
The research shows that from a biopsychosocial perspective, schizophrenia is considered to have genetic or organic roots and the condition can be successfully treated using a combination of prescription medicines and biopsychosocial interventions. While there is not universal consensus regarding this perspective—with some researchers viewing schizophrenia as an incurable "brain disease"—the biopsychosocial model does provide a useful framework in which to better understand the etiology of the condition and to formulate optimal clinical interventions. The growing body of evidence concerning brain localization of schizophrenia contributes further to this understanding. In the final analysis, it is reasonable to conclude that the biopsychosocial model represents a useful and evidence-based approach for clinicians who treat patients with schizophrenia, even as further refinement to incorporate spiritual and cultural factors may enhance its comprehensive value.
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