There are two types of axons in the nervous system&colon; myelinated and unmyelinated axons. These include myelinated as well as unmyelinated nerves. Ventral root afferents are unmyelinated sensory axons located within the pia mater. Conversely, for a given conduction velocity, myelinated fibers are smaller than their unmyelinated counterparts. Group A are heavily myelinated, group B are moderately myelinated, and group C are unmyelinated. Groups A and B are myelinated, and group C are unmyelinated. Single action potentials from unmyelinated axons can be observed. Soft touch refers to the stimulation of slow, unmyelinated C Tactile afferents. According to neuronal studies, 70-80% of pulpal axons are unmyelinated. Upon reaching it, they form a loose, unmyelinated covering over the innervating axons. Results of studies in mice suggest that the axons of ipRGCs are unmyelinated. For example, in the PNS, a large proportion of axons are unmyelinated. The axon initial segment is unmyelinated and contains a specialized complex of proteins. This Lewy body pathology selectively travels through the CNS, targeting thin and largely unmyelinated neurons. Grey matter refers to unmyelinated neurons and other cells of the central nervous system.