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The biological model of abnormality (the only model not based on psychological principles) is based on the assumptions that if the brain, neuroanatomy and related biochemicals are all physical entities and work together to mediate psychological processes, then treating any mental abnormality must be physical/biological.
Biological psychiatry or biopsychiatry is an approach to psychiatry that aims to understand mental disorder in terms of the biological function of the nervous system.It is interdisciplinary in its approach and draws on sciences such as neuroscience, psychopharmacology, biochemistry, genetics, epigenetics and physiology to investigate the biological bases of behavior and psychopathology.
These models specifically examine how these aspects play a role in a range of topics but mainly psychiatry, health and human development. The term is generally used to describe a model advocated by George L. Engel in 1977. The model builds upon the idea that "illness and health are the result of an interaction between biological, psychological ...
Biological psychopathology is the study of the biological etiology of mental illnesses with a particular emphasis on the genetic and neurophysiological basis of clinical psychology. Biological psychopathology attempts to explain psychiatric disorders using multiple levels of analysis from the genome to brain functioning to behavior.
Risk factors for mental illness include psychological trauma, adverse childhood experiences, genetic predisposition, and personality traits. [7] [8] Correlations between mental disorders and substance use are also found to have a two way relationship, in that substance use can lead to the development of mental disorders and having mental disorders can lead to substance use/abuse.
Historically, mental disorders have had three major explanations, namely, the supernatural, biological and psychological models. [1] For much of recorded history, deviant behavior has been considered supernatural and a reflection of the battle between good and evil.
Examples include holistic model of the alternative health movement and the social model of the disability rights movement, as well as to biopsychosocial and recovery models of mental disorders. For example, Gregory Bateson 's double bind theory of schizophrenia focuses on environmental rather than medical causes.
These models are generally assessed according to four facets of validity; the reflection of the core symptoms in the model; the predictive validity of the model; the validity of the model with regard to human characteristics of etiology; [128] and the biological plausibility. [129] [130]