A new study has claimed that sleeplessness may actually shrink a person's brain. In a study that could lead to new treatment for insomnia, the University of Cambridge study — the first to link insomnia to a reduction in vital grey matter — showed that those with chronic sleep problems had lower grey matter density in brain areas. Dr Ellemarije Altena, who led the research, said, the findings predict that chronic insomnia sufferers may have compromised capacities to assess stimuli. This could have consequences for other thought processes, notably decision-making. She said, their finding could pave way for new treatment for those who struggle with sleeplessness as the brain areas are also used to regulate rest. For their study, the scientists compared the brains of chronic insomnia patients to normal sleepers. They found that those with severe insomniacs exhibited the most extensive density loss, regardless of how long they had suffered from the disorder. However, the researchers are not yet able to pin down whether sleeplessness precedes grey matter loss or the other way around. <br/>