People sustaining brain injuries often have sleep difficulties whether it is falling asleep or staying asleep.
Information from Brainline.org regarding sleep stated: "During sleep, your brain and body recharge. Proper sleep follows regular and predictable rhythm cycles. When you sleep, your brain sets down memories and refreshes various connections that allow your brain to work. Quality sleep helps you think more clearly, be more alert, and function at your best in all areas: mental, physical, and emotional." To read more on why brain injury affects sleep, effects of sleep difficulties, what makes it worse and what to do about it, read more at this link: http://www.brainline.org/content/2009/06/sleep-and-brain-injury.html