New Clues to Age-Related Cognitive Decline

Mounting evidence suggests that age-related cognitive decline is caused not by nerve cell death, as it is in Alzheimer’s disease, but from a disruption in synapses, the structures that allow a nerve cell to transmit a signal to other nerve cells. Demonstrating these synaptic disruptions in the prefrontal cortex of the brain, and linking such disruptions to synaptic health, has been challenging for scientists—until now.

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