Figure 9.

The changes of the glial cell morphology differ in their amplitudes during dark and light. A, Mean (±SEM) areas of the glial cell profiles in the IPL during light and dark. B, Effects of glutamate (1 mm), of a solution containing 50 mm K⁺, and of dopamine (100 μm) on glial cell morphology. The effects were measured after 5 min (50 mm K⁺) and 10 min exposures, respectively. The cross-sectional areas of the glial cell stem processes in the IPL are given as percentage of control (100%). The data were obtained in four to nine independent experiments. Significant differences versus control: ^••p < 0.01; ^○○○p < 0.001. Significant differences between light and dark: ^○p < 0.05.