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.
Another cause of left hand numbness could be nerve damage or disease. In such cases, the lack of sensation is frequently associated with pain described as prickling pins-and-needles in the hand. Burning sensations are also common with such conditions.