Too much pruning: A new study sheds light on how neurodegeneration occurs in the brain

Just like pruning a tree helps promote proper growth, the brain uses synaptic pruning to get rid of unnecessary connections between its cells. However, when this normal process, which occurs between early childhood and adulthood, doesn’t stop properly, the brain loses too many connections, including important ones. Because of this excessive pruning, some brain cells die and others cause inflammation, leading to problems with movement, thinking and learning.

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