Figure 3.

Intrinsic optical imaging of rat visual cortex. (A) Image taken under green (540 nm) light to visualize vasculature over visual cortex through thinned skull. Scale bar, 1 mm. (B) Time series of intrinsic images taken at 7 Hz under orange (605 nm) light. First image, baseline period (green); second image, visual stimulation period (red) (C) Time course (mean ± standard error) of intrinsic signal in region of interest indicated in (A, black square). Green bar, baseline period; red bar, stimulation period (stimulus onset at time 0).