I think this question really can’t be answered, until we know what mental illness is. Or perhaps we need to understand the relationship between chemistry and behavior. I’m assuming that everything our bodies do comes down to chemistry of one sort or another.
There are “physical” diseases that have mental effects. A brain tumor might make a person put words together strangely, or discuss ideas that don’t makes sense. Maybe it can make you have hallucinations, too.
Alzheimers affects behavior and mental acuity. There are probably a number of other diseasses that bring on dementia.
My point is that the physical (chemistry) and the mental (behavior?) are interlinked in ways that are difficult to separate out. For most diseases, we say the cause of the strange behavior is physical. Yet, for mental illness, we seem to suggest that it’s not really physical, but somehow volitional.
Leehorton, for example, asserts that we can change our brain chemicals with our behavior. I know a lot of people believe this, and there are many studies that purport to show that CBT or ACT or any number of other therapies can really help people. I haven’t looked at these studies, so I don’t know how help is defined, nor do I know exactly how they measure these things (although I assume it’s on some kind of mood assessment instrument).
My guess is that if they find a patient is back to maybe 80% of former positive mood.. Oh, that doesn’t makes sense. No one has a baseline mood to compare to. So they must be looking at how much improvement they see. So someone could have a 5% improvement in mood, and they’d call the intervention successful.
I’m sure they are doing the best they can, and they’ve thought about most of my issues with respect to study design, but the crux of the matter, I believe, both for researchers and for us patients, is that these things are experiential, and no one can ever get inside someone else’s head.
Maybe I’m well, and I don’t know it. Maybe this sense of existential malaise is just normal for humans. But how can I know that what you consider happy is what I consider depressed?
BTW, it’s not really happiness I’m after, but a sense of rightness with the world. I don’t know what happiness is (another unmeasurable thing, I think), but I have this sense that I’m coping just fine, and then I have a sense (most of the time now) that I’m missing something I used to have.
These things are ephemeral and philosophical and existential, and so no one really knows what anyone else is talking about. And that is the problem with diagnosing a mental illness.
Let’s suppose we find out all there is to know about brain chemistry, and we can “fix” it all. We can turn people into something we call “normal”. What happens when someone experiences the world differently? More troublely? What if they see visions? What if they act super smart one day, and unable to get out of bed the next?
We can change that. We can fix it. What if the patient refuses to be fixed? Is that a symptom, or a rational choice, or even an irrational choice the person has a right to? We allow people with physical symptoms to refuse treatment. We can criminalize mental illness, and hold folks responsible for their choices (now that they could choose to be normal), and throw them in jail when they hurt others.
Right now, we argue over prison or a psychiatric hospital. 60% of the prison population has a mental illness, I believe. This is what we do with the mentally ill. We act as if they choose to behave this way, but do they really?
Behavior, it seems to me, can be determined by chemicals. When we know it well enough, we’ll be able to give people pills to make them smart, or happy, or introspective, or develop a musical talent, or another language. We’ll have pills for docility and cooperativeness, and pills for beligerance and aggressiveness.
What, then, is the responsibility each person has for their behavior, now that we know that have abnormal chemicals determining that behavior? What is their responsibility under the influence of a drug that is designed to make them quick to anger?
Well, enough of this. I didn’t start out to write a treatise, but that’s the kind of shit I think about most of the time, so sorry for letting it spam out of my brain. Hmmm. Maybe it’s the chemicals!