What Is the Purpose of Sleep Testing? Sleep studies, or polysomnograms, are tests to diagnose sleep disorders like sleep apnea, periodic limb movements of sleep, parasomnias (sleep behaviors), and narcolepsy. They generally involve spending the night sleeping at a sleep laboratory or sleep center.
Origin and Meaning of Laura.  1 Laura is a name of Latin origin, and it means Laurel. 2  LP is a rock music, pop music, indie rock, indie pop, and alternative rock musician. 3  Reese Witherspoon is an actress and producer. 4  Laura Prepon is an actress, producer, and model. 5  Laura Dern is an actress, director, and producer.
Laurasia. n. 1. (Placename) one of the two ancient supercontinents produced by the first split of the even larger supercontinent Pangaea about 200 million years ago, comprising what are now North America, Greenland, Europe, and Asia (excluding India).