Neurodegenerative Diseases Conferences 2026-2027 Speech Analysis for Neurodegenerative Diseases challenge (SAND 2026) 4 May 2026 Barcelona , Spain The 4th World Brain Disorders and Neuroscience Summit 2026 (BDNS 2026) 27 May 2026 Singapore , Singapore International Conference on BCl, Neurosciences and Application (BCINA2026) 2 December 2026 Singapore , Singapore