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Brain tour

Brain Basics
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Alzheimer's Disease and the Brain
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5. The neuron forest

The real work of your brain goes on in individual cells. An adult brain contains about 100 billion nerve cells, or neurons, with branches that connect at more than 100 trillion points. Scientists call this dense, branching network a "neuron forest."

Signals traveling through the neuron forest form the basis of memories, thoughts, and feelings.

Neurons are the chief type of cell destroyed by Alzheimer's disease.

©2009 Alzheimer's Association. www.alz.org. All rights reserved. Illustrations by Stacy Janis.
This is an official publication of the Alzheimer’s Association but may be distributed by unaffiliated organizations and individuals. Such distribution does not constitute an endorsement of these parties or their activities by the Alzheimer’s Association.