Creativity and Depression

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I was reading an extract of a fascinating article which may at least partially explain why there is such a strong link between depression and creativity. Scientists have now found that a particular molecule found in depression attaches to the neurotransmitter Seretonin. This molecule appears to have been an evolutionary feature of primate mentality and assists in the concentration necessary to analysing problems without being distracted. The positive side of depression is that often it forces one to consider what is wrong in one's life and then to analyse why that is in order to find a solution. This molecule, apparently, helps with the analysis necessary in scientific and mathematical breakthroughs, as well as many other creative endeavours, which can, in turn, be linked to depression which is often the motivation for the analysis in the first place.