Key: Region: D, dendrite; S, soma (cell body); AH, axon hillock-initial segment of the axon; A, axon; T, axon terminal. Type of dendrite: e, equivalent cylinder (for single dendrites and multipolar trees); a, apical; b, basal; o, oblique. Level of dendrite: (p) proximal, (m) middle, and (d) distal with respect to the cell body. For further explanations, see canonical representations.
Graphic from: Cajal, S. Ramon y (1911). Reprinted and translated by Swanson and Swanson, Oxford University Press, 1995.