Scientists have mastered the techniques of hormone analysis, measurement and manufacture. What is lacking is the correlation between a specific brain… - Richard Bergland

As hormonal amplification is the hallmark of all of the brain-to-gland relationships of neuroendocrinology, hormonal deamplification is the hallmark of all gland-to-brain relationships of endocrine neurology. This is the fundamental difference between the two sciences.

Regulatory messages or hormones flow from specific regions of the brain to specific glands within 'hollow' nerve fibres exactly as Erasistratus, Galen and Descartes had taught.

Gone are the days when scientists believed one hormone was made by one gland. Insulin, for example... is made in other surprising places, like the brain, and even by tiny one-cell organisms without a pancreas.