ABSTRACT
Fatigue has been reported by up to 32–73 per cent of individuals with mild, moderate and severe traumatic brain injury (TBI). Sleep disturbances are also frequently reported following TBI, and may contribute to fatigue. Fatigue may also limit energy for social interactions and/or recreational pursuits, resulting in withdrawal, greater time spent at home and consequent social isolation. Fatigue may be a symptom of depression and depression in turn may cause sleep disruption and fatigue. Fatigue may be associated with muscle weakness or other changes or injuries in the peripheral nervous system. The subjective experience of fatigue is likely to be determined by the complex interaction of functional disability with lifestyle demands, which is difficult to quantify and idiosyncratic. Like fatigue, sleep disturbances have also been associated with pain, depression and anxiety. Bright Light Therapy represents another potential treatment for fatigue and daytime sleepiness.
