Messages within the brain and the rest of the nervous system are sent very rapidly. These messages are conducted by cells called neurons. Neurons are specialized to receive and transmit message and neurons are connected in networks. In...

In this lesson on the brain's neural networks, students investigate the structure and function of the neuron. They discover ways in which engineers apply this knowledge to the development of devices that can activate neurons. Includes...

This module focuses on the science that explains the effects that drugs have on the brain and, by extension, a person's thoughts, feelings, and behaviors. Specifically, it focuses on the adolescent brain. Adolescents may be more...

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...

Nervous system messages are sent as electrical signals along the length of axons and dissolved salts are important for electrical signaling in cells. In this instructional activity students are introduced to this concept by creating an...

From MedlinePlus, a video tutorial featuring information on Parkinson's Disease with accompanying text. Includes closed captioning option. [0:24]

Practice questions covering demyelinating disease and aging.