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NIDA

The Neurobiology of Drug Addiction

2: The brain and spinal cord

The brain and spinal cord

The central nervous system is composed of both the brain and the spinal cord. Describe the brain as a functional unit; it is made up of billions of nerve cells (neurons) that communicate with each other using electrical and chemical signals.

This page was last updated January 2007

NIDA Publications

NIDA Notes: The Latest in Drug Abuse Research

Teaching Packets

Explores the consequences of drug abuse on the brain and body and introduces the topics of prevention, and treatment.