Your brain expands and shrinks over time
Based on more than 120,000 brain scans, the charts are still preliminary. But researchers hope they could one day be used as a routine clinical tool by physicians.
Seven hours sleep is ideal amount in middle to old age, study finds
The study of nearly 500,000 adults aged between 38 and 73 found that both too much and too little sleep were linked with worse cognitive performance and mental health, including anxiety and depression.
A consistent amount of sleep also appeared to be beneficial.
Cognitive assessments based on Western norms are impairing diagnosis and treatment in West Africa
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