Pathway for synthesis and metabolism of serotonin. In similar studies in rats, life extension was produced by giving oxytocin alone. Low acetylcholine levels contribute to the forgetfulness and lack of ability to concentrate which often occurs in old age. The cholinergic nervous system also controls the sensory input; too little acetylcholine and you are easily […]
Read more The Decline of Your Brain’s Chemical Messengers IV
Catecholamines are responsible for a number of different effects in normal humans. They are involved in control of locomotor (moving about) behavior, aggressive behavior, sexual behavior, food intake, and behavior dependent upon positive (reward) and negative (punishment) reinforcement. Acetylcholine controls muscle tone and motor activity and has a role in memory, learning, and long-term planning, […]
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Norepinephrine (NE) is another of the brain’s arsenal of neurotransmitters, important in primitive drives and emotions like sex and in memory and learning. When the level of NE in the brain is too low, people become depressed and their immune systems do not function normally. (That’s because NE can cause the brain to release growth […]
Read more The Decline of Your Brain’s Chemical Messengers II