2025/07/18 by T. Kelly, Michael Döngi, Juan Eduardo Rodriguez-Gatica +16 · 1 voice
Engineering · Neuroscience · #Advanced Memory and Neural Computing #Neuroscience and Neural Engineering #Neuroscience and Neuropharmacology Research
paper · doi:10.1101/2025.07.18.664460
openalex publication_date 2025/07/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Abstract Traditionally, theoretical studies typically described dendritic morphology as optimized for efficient synaptic voltage transfer from spines to the soma, implemented as a tubular design respecting Rall’s 3/2 rule for impedance matching at branch points. Here, we reveal that this view is an oversimplification. Using three high-resolution imaging techniques, we demonstrate that dendrites in cortical and hippocampal neurons contain nanoscale constrictions, comparable in diameter to spine necks. We provide theoretical and experimental evidence that these constrictions partition the dendrite into distinct electrical compartments, significantly shaping dendritic integration of synaptic potentials.