Is depression killing your brain?
Morgan of 3QD points to a fascinating story about new discoveries that are prompting neuroscientists to rethink what depression is, and how anti-depressants actually work.
We're often told that depression is caused by neurochemical imbalances. The assumption is that Prozac and other antidepressants improve the symptoms of depression by boosting the effects of serotonin (or other key neurotransmitters, depending on the drug). Yet, if that's true, why do anti-depressants take weeks to work, despite altering neurotransmitter levels in mere hours?
More recent research suggests that depression is actually a reversible neurodegenerative disease and that antidepressants actually help the brain to heal and thrive again:
In fact, many scientists are now paying increased attention to the frequently neglected symptoms of people suffering from depression, which include problems with learning and memory and sensory deficits for smell and taste. Other researchers are studying the ways in which depression interferes with basic bodily processes, such as sleeping, sex drive, and weight control. Like the paralyzing sadness, which remains the most obvious manifestation of the mental illness, these symptoms are also byproducts of a brain that's literally withering away.
"Depression is caused by problems with the most fundamental thing the brain does, which is process information," says Eero Castren, a neuroscientist at the University of Helsinki. "It's much more than just an inability to experience pleasure."
This new scientific understanding of depression also offers a new way to think about the role of drugs in recovery. While antidepressants help brain cells recover their vigor and form new connections, Castren says that patients must still work to cement these connections in place, perhaps with therapy. He compares antidepressants with anabolic steroids, which increase muscle mass only when subjects also go to the gym.
"If you just sit on your couch, then steroids aren't going to be very effective," he says. "Antidepressants are the same way: if you want the drug to work for you, then you have to work for the drug." [Boston Globe]
I know several people who decline antidepressants because they consider the drugs to be a mere "Band-Aid solution." If this healing hypothesis of antidepressant action is correct, maybe antidepressants aren't just Band-Aids after all.








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