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Medical Wiki

Synapse loss

Loss or degeneration of neuronal connections; in Alzheimer disease it sits close to cognitive decline.

What it is

Synapse loss means loss or degeneration of the connections through which neurons communicate.[1,2]

Why it matters

Because cognition depends on synaptic communication across networks, synapse loss is closely tied to cognitive decline in Alzheimer disease.[2,3]

What it affects

  • Synapse loss can be discussed as a downstream effect of amyloid, tau, inflammation, and other Alzheimer-related mechanisms.[3,2]
  • New biomarkers are being studied to measure synapse injury or loss in living patients.[3,2]

Interpretation traps

  • Synapse loss is close to the cognitive symptom, but that does not make it the only root cause of Alzheimer disease.[1,2]

Related conditions

Alzheimer disease: memory-network failureWhat is the root cause of Alzheimer disease?If synaptic connections came back, would that treat Alzheimer disease?Can synapses be rebuilt, and can neurons be backed up?