Lead researcher Rebecca Spencer from University of Massachusetts Amherst in the US said, "It is interesting to note that despite having atypical or disturbed sleep architecture, people in our study had intact sleep-dependent memory consolidation. Supporting opportunities to sleep following a concussion may be an important factor in recovery from cognitive impairments."
Twenty-six young adults aged 18 to 22 years with a history of diagnosed TBI an average three to four years earlier from various causes, and 30 others with no history of brain injury were part of the study. The researchers found that individuals who had sustained a mild TBI more than a year ago had greater recall in a word memorization task after they had slept than when tested after an equal period awake.
The study authors said, "Overall, sleep composition is altered following TBI but such deficits do not yield insufficiencies in sleep-dependent memory consolidation."
The study is published online in Frontier in Human Neuroscience.