The cognitive argument was more general; i.e. you're generally creative, not only when you're depressed - but there's a correlation between inhibiting general creativity and being disposed to depression and other such disorders.
It's, as you say, most likely a multifaceted case; there's more than one cause and more than one effect.
(but we're kind of straying from the topic, now P:)
"People like you and me overcame the Neanderthals. People like you and me overcame the Ice Age"
"You can hold [the brain] in the palm of your hands - and it can contemplate the vastness of interstellar space"
"Along some paths of cosmic discovery there are times when, at least for now, one must be content to love the questions themselves"
The Symphony of Science; a tribute to the marvels of science and nature.
Writing is a lot of things to me. In one sense, it's a release. It's putting all the interesting ideas I have, and getting them all out. It's crafting the characters whose voices speak to me and creating the worlds I wish I could explore. In another sense, it's a way of fighting. It's a way of creating characters like me, who are POC, who are LGBTQIA, who are outside of the exclusionary 'norm' of things. Writing my own work allows me total creative control, so I can tell the stories I want, the characters I want. So I can avoid a romance and focus on friendship, or create a romance that makes sense to me. I write because if I don't, I'll never see the stories I really want.
Three Times the Isshu: A Nuzlocke Novelization of Pokemon Black and White by Rai Thunder
Under One Sky - An Ask/RP blog for the characters of Three Times the Isshu and the unpublished fic Flying High(Diving Deep). Stop in, ask questions, get some answers.
No matter what you do, I will be who I will be. The question is, who are you?