Figure 8. Schematic of TRP channel and neuropeptide vesicle expression in the cornea. Neurons expressing TRPM8 extend to the periphery with complex terminals, but are also found in ramifying terminals in the pericentral region and simple terminals in the center of the cornea. Neurons expressing TRPV1 colocalize with CGRP and ScgII and extend to the corneal surface as ramifying and simple termini. Neurons expressing TRPA1 colocalize with SCG3 and NF200 and terminate in the stroma and sub-basal regions.