A mild head injury can increase your chance of developing a sleep disorder, according to an Israeli study.
Researchers found 36% of 42 patients with mild traumatic brain injury had developed a circadian rhythm sleep disorder. Of those, eight people had a delayed sleep phase syndrome with problems falling asleep and waking up, and seven people had irregular sleep-wake patterns.
The authors said: 'This is concerning since sleeping problems may exacerbate other brain injury symptoms such as headache, emotional distress, and cognitive impairment, making the rehabilitation process much harder.'
Neurology (2007) 68: 1136-1140