Fasted and low-carb states lend themselves to alertness. Carb-rich states lend themselves to calmness and sleepiness.

There are endokrine signal involved to signal hunger and satiety. The archuit nucleus release chemicals that act as brakes and accelerators of hunger. - The PMOC neurons (system) produce a-MSH, which reduces appetite and get active while eating. They are activated by ultra-violate light to the eyes, which explains the lower hunger and appetite in... See more

According to one theory, it is in the organism’s best interest to remain ignorant, and sleep exists to prevent us from acquiring unnecessary knowledge.

There are three ways to flush acute glutamate buildup from the brain:

1. Exercise. The brain can direct glutamate to be used as an energy source to dispose of excess amounts. Glutamate naturally flows by diffusion from areas of high concentration (in blood vessel wall cells) through the blood vessel wall into the circulating bloodstream, where the... See more

The brain uses a process called sensory gating to filter out redundant or familiar information so it can conserve energy. It’s brilliant for survival and focus, but it comes at a cost.