Term: type (b) narrow-field unistratified amacrine cell

Definition: The type (b) narrow-field unistratified cell has a similar [collator note: with the type (a) narrow field unistratified amacrine neuron] mean soma diameter of 9.2 micrometers (range 7.5 to 11.3 micrometeres; N = 14) and the size of its dendritic field is similar to the the type (a) narrow field unistratified cell (mean 215 micrometers; range 135 to 282 micrometers; N = 14). A single primary dendrite arises from the cell soma and passes into the inner plexiform layer before branching on a plane. In contrast with the type (a) narrow field unistratified cell this cell has coarser, mostly spine-free, dendrites. Figure 3 and 12 show examples of this cell tpye, one of which has its soma in the ganglion cell layer.