Add Yahoo as a preferred source to see more of our stories on Google. Your thoughts begin to gently drift off the plane of reality and you’re about to transition from that dreamy state to complete ...

Hypnic jerks, also known as sleep starts or hypnagogic jerks, are abrupt muscle contractions or twitches that happen as soon as you fall asleep. Up to 70% of adults will experience this at least once.

Twitching at night—it’s something few of us talk about, yet it’s also a phenomenon that impacts Americans when it comes to sleep quality. And even if you feel like you’re getting enough sleep, you ...

Add Yahoo as a preferred source to see more of our stories on Google. You’re relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it’s a muscle in your arm, your leg, or your ...

Doctors identify these movements as 'fasciculations', because they occur when individual nerve fibers, which control small muscle groups activate independently to produce brief muscle contractions.

Add Yahoo as a preferred source to see more of our stories on Google. A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle.

June 16 (UPI) --New research suggests infants use a newly discovered sleep phase to develop brain-body communication and coordination. For years, scientists at the University of Iowa have been ...