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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Aging and the Immune System II

One of the most important factors leading to immune system decline is the greatly reduced rate of release of growth hormone by the brain as we age. This hormone, produced by the pituitary gland, begins to fall off in quantity after your teens. Since the thymus gland requires growth hormone to function properly, this decrease […]

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