Separating hemodynamic activity in mouse visual cortex into local and global components. A: experimental setup showing the camera for intrinsic imaging and the green LED (530 nm), the camera for eye tracking and the infrared LED (850 nm), the monitor showing the drifting bars, and the head fixation system. B: the spatial component F(s) of the separable model (). A, anterior; P, posterior, L, lateral, M, medial. C: the temporal component G(t) of the separable model (global component). D: map of preferred elevation obtained from the data in H. E: the response to moving flickering bars, expressed as a function of space (concatenated into a single dimension) and time, 10–40 s after stimulus onset. F: the baseline image in B expressed as a 2-D matrix. G: the global component in C expressed as a 2-D matrix. H: the local component. Pixels in E–H were sorted by their phase at the frequency of the stimulus.