The Decline of Your Brain’s Chemical Messengers III

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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The Decline of Your Brain’s Chemical Messengers II

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 […]

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The Decline of Your Brain’s Chemical Messengers I

In senile degeneration the nerve-cells are surrounded by neuronophages which absorb their contents and bring about more or less complete atrophy. —Elie Metchnikoff, The Prolongation of Life (1908) Mind, mind alone, Is light, and hope, and life, and power! —Ebenezer Elliott (1833) Your brain works because your-nerves talk to each other with chemicals called neurotransmitters […]

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