12.4: Nerves Last updated Jun 23, 2019 Save as PDF 12.3F: Somatic Sensory Pathways to the Cerebellum 12.4A: Structure of a Nerve Page ID7191 ( \newcommand{\kernel}{\mathrm{null}\,}\) Topic hierarchy12.4A: Structure of a Nerve12.4B: Classification of NervesNerves are primarily classified based on their direction of travel to or from the CNS, but they are also subclassified by other nerve characteristics.