Brain

The brain is a pinkish-grey, wrinkled organ that fills the skull — looking, for all the world, like a huge walnut. It is hard to believe, from its appearance, that this ugly lump of jelly contains the mechanisms of thought, perception, will, and consciousness, that it is the seat of our personality. Its 100,000 million nerve cells, each with an average of 100,00 connections from other neurons, makes the human brain the most complicated and least understood object in the known universe. The vertebrate brain is the large anterior portion of the central nervous system . The "cranial vault" of the skull encases the brain in most vertebrates. In invertebrates, the enlarged and specialized anterior ganglion of the central nervous system is often referred to as a brain, although not all scientists regard it as a true brain.

Hypomania

Hypomania is a state of mind, mood and behavior that may express itself as unusual gaiety, excitement, flamboyance or irritability. In addition, hypomania is accompanied by such behaviors as restlessness, talking nonstop, feeling fresh on only a few hours of sleep, furious focus on a single activity or being much too easily distracted, and/or a variety of other symptoms. The diagnostic criteria for a hypomanic episode are quite specific, but the way the symptoms appear can vary widely from one person to another.