Definition of meta-analysis : a quantitative statistical analysis of several separate but similar experiments or studies in order to test the pooled data for statistical significance new!
Numbness or tingling in the hands occurs when nerves in the arm or wrist are compressed or damaged, according to WebMD. One of the simplest causes for nerve compression during sleep is when the arm is bent for a prolonged time or rested underneath another part of the body.
Numbness and tingling can be caused by a number of factors including: 1  Remaining in the same position (seated or standing) for a long time. 2  Injury or pressure on a nerve (for example, a back injury can cause numbness in the legs or feet, and a neck injury can cause numbness in the arms and hands). Numbness and tingling are common symptoms of anxiety, panic, and stress.