Fig. 12. Confocal overlays showing immunolabelled radial nerve pathways. Nerves showing FMRFamide-like immunoreactivity (FaIR) are green, other nerves red (antitubulin). (A) Subumbrellar radial strand showing the giant axon and the small axon bundle. (B) Peduncular radial strand showing small axon bundle and non-FaIR elements. (C) Manubrium, showing small axon bundle whose axons are now spread out, and underlying, non-FaIR plexus.