Biological psychiatry pursues a biomedical model where many mental disorders are conceptualized as disorders of brain circuits likely caused by developmental procedures shaped by an unpredictable interplay of genetics and experience. Mental disorders can arise from different sources, and in many cases there is no single accepted or consistent cause right now established. A mixed or pluralistic blend of models may be used to explain particular disorders. The primary paradigm of contemporary mainstream Western psychiatry is said to be the biopsychosocial model which incorporates biological, psychological and social factors, although this may not always be applied in practice.
Evolutionary brain research may be used as an overall explanatory theory, while attachment theory is another kind of evolutionary-psychological approach in some cases applied in the context of mental disorders. Psychoanalytic theories have continued to advance alongside and intellectual behavioral and foundational family approaches. A distinction is some of the time made between a "medical model" or a "social model" of disorder and disability.
Psychiatrists try to give a medical diagnosis of individuals by an assessment of side effects, signs and impairment associated with particular kinds of mental disorder. Other mental health professionals, for example, clinical psychologists, may or may not apply the same diagnostic categories to their clinical formulation of a customer's troubles and circumstances. The majority of mental health issues are, at least initially, assessed and treated by family physicians in the UK general practitioners during consultations, who may allude a patient on for more specialist diagnosis in acute or chronic cases.