Subscribe Now! National Geographic Magazine $15
Home
Animals
Daily News
Environment
Green Guide
History
Kids
Maps
Music
Photography
Science & Space
Travel & Cultures
Video
National Geographic Magazine
National Geographic Channel
Magazines
Shop
Subscriptions
TV & Film
Travel With Us
Our Mission
Visit our Online Shops
Books & Atlases
Clothing & Accessories
DVDs
Maps
Catalog Quick Shop

Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Sign up

Skin Stimulation
Photo: A researcher tests skin stimulation
WALLPAPER
Wielding a single hair on a brush, a researcher tests the effects of a caress on skin. Stimulation of pressure and pain receptors under the skin can result in ticklishness or itching—sensations that arise from neurological transmission.
Photograph by LookatSciences/Phototake USA

Related Photo Galleries
Photo: Chinese woman blowing cigarette smoke

Photo Gallery: Cancer

Photo: Man in mask surrounded by volcanic ash and smoke

Photo Gallery: Lungs

Photo: Lateral view of human brain

Photo Gallery: Brain

Health and Human Body Topics

SPECIAL ADVERTISING SECTION
Phot: Girl drinking bottled water

Interactive Map

Explore the signs of and solutions to the world’s water crisis.

Photo: Rainbow Valley

Photo Gallery

Experience the majestic beauty of Australia’s outback.

Body: The Complete Human
Image: Cover of Body: The Complete Human book

Explore the human machine.

Shop National Geographic

The Incredible Human Body DVD and Video
Image: Cover of the Incredible Human Body video and DVD

Explore the human body from the inside out.

Shop National Geographic