1.   Benzodiazepines differ in how quickly they affect sleep and how long effects last.

2.   Nicotine can affect sleep in two ways.

3.   To understand how exercise affects sleep, you must understand the circadian rhythm of the human body.

4.   By understanding the developmental issues that affect sleep, you can help her slumber blissfully from infancy to adulthood.

5.   Valentin said he has been taking anti-inflammatory medication for the wrist, but admitted that the pain is strong enough to affect his sleep.

6.   Although there were coolant leaks, a fire and a near collision during his stay, both Linenger and Monk said those things had not significantly affected his sleep.

7.   In severe cases, the powerful emotions affected sleep, attention to work and even caused physical weakness.

8.   The four astronauts who served as human guinea pigs for the medical experiments slept with electrodes attached to their heads to determine how weightlessness affects sleep.