One of the hallmarks of Alzheimer’s disease —  the most common form of dementia — is the build-up of beta-amyloid protein deposits in the brain. Now a new study published in the journal Nature Neuroscience suggests that in some older people, the brain has a way of compensating for this damage by recruiting extra brain circuits.

Previous studies of scans have shown that some older adults with Alzheimer’s damage who retain thinking and memory capacity show signs of extra brain activation.

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