Figure 2. Examples of camera-lucida drawings of biocytin-labeled layer 1 cells. A, B, Ascendant cells, defined by their dendritic projections (black), which extend upwards in relation to the cell body. The neuron in A exhibited a d-NAC firing pattern, while the neuron in B exhibited a c-AC firing pattern. C, D, Descendant cells, defined by their dendritic arbor, which projects downwards from the cell body. Axon arborization (red) was not evaluated in this study. Scale bar = 50 µm. d-NAC = delayed non-accommodating cell; c-AC = classic accommodating cell.