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[–][deleted] 11 insightful - 1 fun11 insightful - 0 fun12 insightful - 1 fun -  (3 children)

Depression is not exclusively genetic. Many illnesses are multifactorial. These are well-established understandings.

https://www.health.harvard.edu/mind-and-mood/what-causes-depression

[–]SexualityCritical[S] 2 insightful - 7 fun2 insightful - 6 fun3 insightful - 7 fun -  (2 children)

'Research shows that the hippocampus is smaller in some depressed people. For example, in one fMRI study published in The Journal of Neuroscience, investigators studied 24 women who had a history of depression. On average, the hippocampus was 9% to 13% smaller in depressed women compared with those who were not depressed. The more bouts of depression a woman had, the smaller the hippocampus.'

Bruh, your own study seems to disprove what you've been saying (though, I must admit, the sample size was pretty small, unfortunately). Additionally, the article you referenced literally showed which exact areas of the brain were affected by depression, meaning that it can, accurately, be neurologically examined.

[–]Juniperius 10 insightful - 1 fun10 insightful - 0 fun11 insightful - 1 fun -  (1 child)

Brains are plastic. They change in function, interconnectivity, and size of various areas in response to the environment and habits of the person. If the hippocampus is smaller in depressed people, it could just as easily be an effect of depression, rather than a cause. Furthermore, a) fMRI studies are stupid, they can find what appears to be brain activity in a dead fish, b) 24 study participants is insufficient to draw any kind of conclusion and should only be used to suggest that further study might be interesting, c) one study doesn't mean anything until it has been replicated, it's only when a mass of evidence starts to build up that scientists will begin to treat the hypothesis as being strongly supported.

[–]VioletRemihomosexual female (aka - lesbian) 10 insightful - 7 fun10 insightful - 6 fun11 insightful - 7 fun -  (0 children)

In one research tram drivers all had similar brain structure.

Tram-driving is the new sex!