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Psychiatry is usually hated by most because of the shaky science. A Psychiatrist is supposed to learn mental health on a medical and biological level.
No a psychiatrist leans about mental illness, not mental health. The emphasis is on biomedical discourses, but we should also learn cognitive, behavioral, psychodynamic, systemic, social realist, social constructivist, and possibly existential models of mental illness too - though the emphasis is usually on biomedical and psychodynamic with a bit of the cognitive-behavioral thrown in.
And i don't think DSM-5 is going to do that. I do think that we have to put more focus on biology and start researching ways to make more illness clean cut (psychosis and manic depression are examples of clean cut ton me, ADHD and Autism still need more research IMO.)
You can't make arbitrary constructions clean-cut - there is nothing clear cut about manic depression and psychosis, not in diagnosis, not in phenomenology, not in genetics, not in epidemiology because 'schizophrenia' and 'bipolar disorder' are essentially arbitrary constructs from trying to categorize and classify forms of madness that have no external validity in reality, and then trying to validate them by finding genetics, neural substrates and so on and acting surprised when you don't come up with anything! One of my professors was the leading schizophrenia researcher in the world at the time, and told us there was nothing clear cut about distinguishing schizophrenia from bipolar, or even teasing apart psychotic symptoms in the general population, from those who were mentally ill. I'm biased of course, but I think we need to put more emphasis onto epidemiology, phenomenology and studying psychiatric symptoms in the healthy population to understand why some people develop some mental disorders, and others don't, or why one person develops 'schizophrenia' and another bipolar disorder. Without a pretty good description (and I don't think the RDC or DSM-X did give decent criteria for research) and a good understanding of the occurrence of various symptoms in the populations we have no chance of doing proper work with genetics or imaging etc. The other problem with genetics is we have typically stopped with associations - most studies these days are case-control studies - they look for SNPs using GWAS or copy number variations, or chromosomal microdeletions. They rarely (if ever) look at biological plausibility - i.e. what does this gene or SNP do that provides a plausible explanation for this association?
Time and time again you will see a pt diagnosed with bipolar who comes in psychotic with no affective symptoms and you will think - how can this person have been dx with bipolar, they look schizophrenic! I have even had attending say "this patient doesn't have a bipolar bone in their body!" and then you chat to some other psychiatrist or nursing staff and they will say "I remember this guy, he was floridly manic the last time he was here.." - so they end up either being dx with schizophrenia or schizo-affective disorder, which is essentially a relic of our neo-kraepelinian dichotomy.
Psychiatry is one of the few specialties where we don't rely on special investigations and instead on the history and physical. This is where the money is in pretty much every specialty. 85% of the diagnosis in neurology is in the history (symptoms, temporality, risk factors and so on), about 10% in the examination - but today we rely heavily in imaging and other investigations. These should mostly be used to confirm the diagnosis. Could you imagine if I told a patient "Your blood test and fMRI and MEG scans confirm the diagnosis of depression." - They would say "I could have told you that!" The art of psychiatry and its humanity is wedded to our emphasis on the history and interviewing. I can't help but feel something is being eroded in quest for biomarkers. I think it would be great if you could have a way of knowing with high sensitivity/specificity whether a depressed pt is bipolar or unipolar, but can't help but feel that what would happen is what has happened in the rest of medicine - investigations will become used to make the diagnosis, at the expense of an empathic, considered, and thorough assessment, instead of to support the diagnosis, which is how they should be used.