Alzheimer's Early Signs Detected Outside Brain, Study Finds

• A study suggests early signs of Alzheimer's disease may appear outside the brain.
• Genetic mutations linked to inherited Alzheimer's can disrupt nerve-to-muscle connections without brain involvement.
• Researchers found these disruptions using miniature laboratory systems made from human cells.
• The discovery could explain why some patients experience changes before memory loss.
• The study indicates that symptoms may start in the ear or nose up to a decade before memory loss.