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In the intricate landscape of the brain, cells constantly communicate, sending and receiving messages that govern our thoughts, memories, and movements. For decades, scientists believed this communication occurred primarily through direct synaptic connections. However, a new paradigm is emerging, centered on tiny messengers called extracellular vesicles (EVs). These microscopic packages, once dismissed as cellular debris, are now understood to be critical players in both health and disease. Groundbreaking research reveals that EVs facilitate the spreading of Lewy pathology between the peripheral and central nervous systems, fundamentally changing our understanding of how neurodegenerative di …