The human brain is complex. Messages within the brain and the rest of the nervous system are conducted by cells called neurons. Drugs and other substances can interfere with or modify the transmission of messages between neurons. In this...

In this transcript from FRONTLINE: "Inside the Teenage Brain," neuroscientist Dr. Jay Giedd discusses new research on brain development in teenagers.

What makes you notice someone in a crowd? Why do some things stand out, while others melt into the background? In this experiment you can investigate the psychology of how things get noticed, by studying how our brains perform a visual...

Think it's a good idea to plug into iTunes, surf the Web, or watch TV while doing homework or trying to read? Many people do it and claim that jumping from one activity to another keeps their attention level up and even gives their brain...

Self-guided learning activity where students learn about the structure and function of the human nervous system. There is a short quiz at the end of the lesson to check for understanding.

Learn about the anatomy of the human brain.

Our brains are split into two parts, right inside our head. One half is the left brain and the other half is the right brain. Each side of your brain controls different parts of your body and most people are more dominant controlling one...

Explore walking upright, tools and food, bodies, brains, social life, language and how humans ultimately changed the world. Excellent charts, pictures and videos accompany easy-to-understand text on the earliest humans.

Series of seven video lectures delivered by Standford University professors on the future and frontiers of human health. Videos vary in length. Comments sections at the bottom of the page.

See how the human ear senses a sound, and how that stimulus is transmitted to the brain for interpretation and response.

The Stroop effect describes an experiment about the time it takes to name the color of printed words. When you try to name the color in which color words are printed, it takes longer when the color word differs from the ink color than...

In a dystopian world, your resistance group is humanity's last hope. Unfortunately, you've all been captured by the tyrannical rulers and brought to the ancient coliseum for their deadly entertainment. Will you be able to solve the...

This is an experiment that explores certain aspects of how your brain pays attention. In this project, you'll have to recruit volunteers to take a simple test: naming a list of printed shapes. What makes the test tricky is that words...

Identify basic trends in the evolutionary history of humans, including walking upright, brain size, jaw size, and tool use.

Are you an avid video game player? Do you think this helps you have fast reaction times? This Science Buddies science project lays out an experiment to help you test your hypothesis. The Science Buddies project ideas are set up...

Can you pat your head with one hand while you rub your stomach with the other? This experiment is kind of like that, but it can actually give you some insight into how your mind works. The task is to name colors. It sounds simple enough,...

This site from the Partnership for a Drug-Free America is organized in question/answer format, this website provides a good introduction for students wanting to know about PCP and its hazardous effects on the human body and brain.

This lesson describes the function and components of the human nervous system. It helps students understand the purpose of our brain, spinal cord, nerves and the five senses. How the nervous system is affected during spaceflight is also...

An adult human can distinguish up to 10,000 odors. You use your nose to figure out what to eat, what to buy and even when it's time to take a shower. But how do the molecules in the air get translated into smells in your brain? This...