isBiomarkerOfAging disease pathologic process functional connectivity decline generated with ChatGPT version 4,0 on 19.06.2024 Functional connectivity decline refers to a reduction in the coordinated activity or communication between different regions of the brain over time. It typically indicates weakened synchronization in neural signals, often observed in aging, neurodegenerative diseases (like Alzheimer’s), or brain injury. This decline can affect cognitive functions such as memory, attention, and executive processing.