Brain network segregation attenuates tau spreading in Alzheimer’s disease

In Alzheimer’s disease (AD), the functional connectome plays a key role in the trans‐neuronal spreading of tau pathology, a key driver of cognitive decline. The functional connectome is comprised of segregated, but communicating networks which lose segregation with age, resulting in an overall more diffuse connectome. Prior neuroimaging studies have found an association between weaker network segregation and faster symptom manifestation in AD, however, it is unclear if this association occurs because of a more diffuse connectome facilitating connectivity‐mediated tau spreading.