Axon hillock ( Schaffer, 1893 ) : The expanded part of an axon trunk as it arises from the cell body (Deiters, 1865) or dendrite (His, 1889) of a neuron (Waldeyer, 1891), often distinguished by a relative absence of ribosomes; discovered in macerated microdissected ox spinal cord by Dieters (1865, Tab. 1, fig. 1) and named by Schaffer (1893, p. 850). Also see Peters et al. (1991, pp. 101-108).