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 illustrated explanation of the neurons in the brain and the effects of tolerance and withdrawal.

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...

This online biology book chapter offers definitions and descriptions of the nervous system's components.

An animal's response to a stimulus is coordinated by its central nervous system (CNS). Neurons carry electrical impulses, and are connected by synapses. Some drugs and toxins affect how impulses pass from one neuron to the next across a...

Take a glimpse at the way normal brains work and about brain disorders. Learn how research and technology help us learn about the fundamental molecular workings of the brain.

Go on a mission inside a nerve cell to find out about how neurons produce and release neurotransmitters to communicate with other neurons. Learn what happens to these brain chemicals when the drug ecstasy interrupts the process.

Learn about the brain and brain science using this Spanish version of the excellent Neuroscience for Kids site. Translation of the site is a work in progress. Portions are in Spanish but links for many pages still lead to the English...

Use this review guide of the human body nervous system to understand its importance to the human body.