![Brain activity, computer artwork.](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/BLQ53FPFHGKIGPMEAEE25AYXEY.jpg?smart=true&auth=ee9eeab4836464543aaeb712eccb5e668a26171b1d3eab120a0e9b77b4fa70d3&width=400&height=225)
Researchers reviewed the sleeping patterns of participants over many years. Getty
Researchers reviewed the sleeping patterns of participants over many years. Getty
Broken sleep in middle age linked to dementia
Research finds people who sleep fewer than six hours a night are at higher risk of the condition