Fig. 5.

Population orientation tuning width of the pinwheel neurons is broader than domain neurons only under the HC CRF condition. Scatter plots show the relationship between the HWHH ($y$-axis) and HI ($x$-axis) for the HC CRF (a) and CRF+ECS (e) and the LC CRF (b) and CRF+ECS (f). Low HI values correspond to neurons in pinwheels (open circles) and have an HI range of 0.05 to 0.38; Higher HI values correspond to domain neurons (filled circles) and range from 0.65 to 0.97. Mean HWHH is indicated for domain and pinwheel neurons by black and white filled arrowheads, respectively. To facilitate comparisons, the number of cells per HWHH is presented in the bar graph in (c, d and g, h); black bars represent domain neurons, white bars represent pinwheel neurons. Arrows also indicate means for each cell type. The HC CRF (a, c) is the only condition where the average HWHH differs significantly ($p<0.01$) between domain ($29.8\mathrm{deg}\pm 1.5\mathrm{deg}$) and pinwheel ($35.2\mathrm{deg}\pm 1.5\mathrm{deg}$) neurons.