• Developmental neurogenesis and morphogenesis across species shows conserved nerve formation trajectories from rats to mammals and fishes, linking age-related histogenesis and growth of ganglia, trunk and peripheral nerves to overall neural patterning [2], [3], [5], [6], [8], [14], [17].

• Structural architecture and connectivity patterns in the nervous system emphasize how roots, trunks, and afferent/efferent pathways organize spinal and cranial nerves, revealing recurring anatomical motifs across species [1], [4], [11], [12], [17].

• Autonomic nervous system development and organization focuses on sympathetic pathways, segmental trunk circuits, and ganglia in mammals and fishes, highlighting conserved autonomic wiring and its developmental dynamics [8], [10], [14], [16], [20].

• Fiber growth and differentiation dynamics investigate medullated vs non-medullated fibers, outgrowth modes, and topographic tract formation as nerves develop, with cross-species observations [5], [13], [17], [19].

• Degeneration, regeneration, and neuroplasticity are explored through degeneration/regeneration studies and limb transplantation experiments, highlighting nerve repair mechanisms and developmental plasticity [18], [19], [20].