Sleep Disorders

by Barbara Sheen Busby

A sleep disorder is a condition that affects normal patterns of sleep and wakefulness. Although sleep disorders are not new, modern life seems to be intensifying the problem. Round the clock work schedules, globalization of commercial markets, stores that never close, television, and the Internet have all contributed to people sleeping less. Americans averaged nine hours of sleep per night in 1910. Today they average only 6.5 hours. This well-researched...

• Format: Library Binding
• Language: English
• ISBN: 1420509144
• ISBN13: 9781420509144
• Release Date: March 2013
• Publisher: Lucent Press
• Length: 104 Pages
• Weight: 0.70 lbs.
• Dimensions: 0.5" x 6.1" x 9.1"
• Age Range: 12 to 15 years
• Grade Range: Grades 7 to 10