[sp3000]

Here is a cause and effect: Optimal neurotransmitter function highly depends on sleep quality and quantity (and you can further the connection to movement and nutrition as well). Sub-optimal neurotransmitter function can lead to sub-clinical or clinical depression.

"Studies have shown that NREM sleep is important for turning off the norepinephrine, serotonin and histamine neurotransmitters, which in turn allows their receptors to “rest” and regain sensitivity [13]. This allows norepinephrine, serotonin and histamine to be more effective at naturally produced levels."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4651462/

[brianmcc]

Thanks - that's more like it!