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Science
Barbara Jacquelyn Sahakian, Professor of Clinical Neuropsychology, University of Cambridge

Sleep: here's how much you really need for optimal cognition and wellbeing – new research

Most of us struggle to think straight after a poor night's sleep. Hank Grebe/Shutterstock

Most of us struggle to think well after a poor night’s sleep – feeling foggy and failing to perform at our usual standard at school, university or work. You may notice that you’re not concentrating as well, or that your memory doesn’t seem up to scratch. Decades of bad sleep, however, may potentially lead to cognitive decline.

Bad sleep also affects people’s mood and behaviour, whether they are young infants or older adults. So how much sleep does our brain need to operate properly in the long term? Our new research study, published in Nature Aging, provides an answer.

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