The brains of people complaining sleep disorders may be less wired to block out noise, according to researchers from Massachusetts General Hospital and Harvard Medical School in Boston.
One in three Americans get enough sleep, while 10 percent of them report difficulty sleeping and other 16 percent have insomnia or other chronic sleep disorders.
The researchers recruited 12 volunteers with no prior sleep disorders, having the ages between 20 and 46. These solid sleepers spent three nights in a comfortable room, having four speakers near their bed, being exposed to 14 different …