12 Cranial Nerves: Origin & Conduction Map (2D)

A flat schematic diagram of the brainstem with all twelve cranial nerve pairs drawn at their true rostro-caudal exit level — forebrain, midbrain, pons or medulla. Click any nerve (in the side list or directly on the diagram) to trace its path, see whether it is sensory, motor or mixed, and watch an animated signal travel it at that nerve's actual physiological conduction velocity, derived from its dominant axon fiber class (Erlanger–Gasser classification) via Hursh's v ≈ 6d rule. A type filter dims every nerve outside the chosen class, live readouts report conduction velocity, path length and conduction time in milliseconds, "Show all 12" lights up the whole (filtered) map at once color-coded by type, and Quiz mode hides the label and scores how many nerves you can identify by their brainstem origin alone.