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" ... And that's what the research shows happens when we fast: norepinephrine (closely related to adrenaline) levels increase which enhances mental focus, and increases memory storage and retrieval in the brain. Dr. Fung recounts a story from the book Unbroken, which is a memoir of American soldiers condemned to starvation conditions in a Japanese prison camp. The author, Laura Hillenbrand, recounts how one prisoner found himself able to recall entire books from memory alone. Another prisoner managed to learn Norwegian in a single week. Interestingly, the author mentions as an aside that such feats of mental enhancement were well known as side-effects of starvation. ... "
" ... Stress and anxiety result physiologically from the “fight or flight” – or sympathetic nervous system – response triggered by cortisol and norepinephrine. Connection, on the other hand, produces oxytocin (known as the “cuddle hormone”) and triggers our relaxation – or parasympathetic nervous system – response. To make matters worse, isolation and disconnection both breed and exacerbate anxiety. In other words, connection is essential for maintaining mental wellbeing always, and particularly essential during high-anxiety times. ... "
" ... Summary: So as you can see, waking up is a very complex system that involves many different areas of the brain and many different neurotransmitters and hormones. If you were to choose which are most important I would say that norepinephrine is important for arousal along with having low levels of melatonin and adenosine (opposed to high). Glutamate is important for regulating the length of sleep and orexin regulates the levels of many neurotransmitters involved in waking including norepinephrine. ... "
" ... The article perpetuates the idea that these drugs calm kids with ADHD down, but have a different effect on health people. Actually, the drugs do exactly the same thing in people whether they are hyperactive, have problems paying attention, or are healthy. They improve focus by increasing the levels of the neurotransmitters norepinephrine and dopamine in the prefrontal cortex, the front part of the brain that regulates attention and behavior. Basically, light that up and everything else gets controlled. But your heart still races. ... "