The brain constitutes only about 2 percent of the human body, yet it is responsible for all of the body's functions. Learn about the parts of the human brain, as well as its unique defenses, like the blood brain barrier.

Scientists are studying tadpoles to look at how their neural circuits develop. These neural circuits are made up of many neurons. Neurons generate electrical and chemical signals in order to communicate with one another.

Scientists are trying to understand how the brain forms and processes emotions. They are conducting research on the brain patterns of positive and negative emotions to understand the brain a little bit better.

There are different types of thinking that occurs in the brain: system 1 (fast and immediate), and system 2 (longer thought processes). These systems work together to create thoughts and answers in your head.

Neurobiologists look at the brains of different animals. They are conducting research on the zebra fish's brain and how it responds with different movements.