Do you often feel bad mood, not calm, and easily distracted after having nightmares or when your sleep disturbed? It has nothing to do with the feeling and can be explained scientifically. A research shows that lack of sleep or sleep disorders affect parts of the brain associated with emotions. This then triggers the emergence of a sense of worry and anxiety. Researchers from the University of California, Berkeley found that when people lack of sleep or often feel disturbed while sleeping, the activity in the amygdala and insular cortex region of the brain will increase. The increased activity was then trigger anxiety and worry naturally. "It is difficult to find if lack of sleep is a result of anxiety, or lack of sleep can actually cause the emergence of anxiety. However, this study helped us find a link causal more clearly," said researcher Andrea Goldstein, as reported by the Huffington Post (27/06). These results were obtained after the researchers observed ...