Do you wake up during the night by the slightest of sounds? It turns out that some people’s brains are hard-wired to block out external stimuli, while others are aware of any noise that goes bump in the night. For light sleepers ambient sounds are the most common cause for interrupted sleep since the mind receives and monitors stimuli in order to protect them from outside threats or hear a baby cry. But it should also block sounds to let them fall asleep easy and stay asleep so they can recharge their "brain battery" as well as getting the deep sleep they need to feel refreshed the next day. Many light sleepers brains respond to all surrounding stimuli no matter if it’s nonthreatening like traffic, partner snoring or dogs barking and/or threatening such as a fire alarm or an intruder in the house. Are YOU a light sleeper? I was born this way. Read more »