Fig. 2. .

Low-power photomicrographs of the laminar distribution of nNOS-IR neurons in the bat visual cortex. (A) Thionin-stained section showing cortical lamination. (B and C) nNOS-IR neurons. nNOS-IR neurons were only found in a small subset in the bat visual cortex that exhibited two different types of labeling. Notice the two different labeling densities of the nNOS-IR neurons. Arrowheads indicate weakly labeled neurons. The Roman numerals on the left side of this figure indicate the layers of visual cortex. Bar=100 μm.