Part Two - Sleep and Emotional States After a good night's sleep, you should feel rested physically but also calm and more centered emotionally. However, if you are sleep deprived you may have noticed feeling more agitated, anxious or even depressed. You're not alone in this and it's more than just anecdotal evidence. Sleep deprivation, and the resulting change in our emotional states, has been researched using MRI scans to observe changes in brain activity. In a study (1) w