Your brain’s one hard-working, little contraption- so it’s no surprise that it needs roughly a fifth of your daily calories to keep you going. To carry information, chemical signals fire across of a mind-boggling number of brain-cell synapse (roughly several trillions). Much of that energy goes towards the frontal lobe- the part of the brain associated with reward, attention, short-term memory tasks, planning, and motivation.
The average brain weighs just under 3 pounds. Your brain constitutes 80% of your head unit; with clear liquid that buffers neural tissue, makes up the rest. Now picture this; if your entire brain, blood, and fluids were to be pureed and poured into a 2-liter soda bottle, it would come about 1.7 liters. Isn’t that a refreshing image?