Movie S4.

Neurovascular coupling at low frequencies (no time shift between neural and hemodynamics). Hemodynamics-corrected Thy1-GCaMP6f ΔF/F movie shown unfiltered (Left) and temporally low-pass filtered at 0.4 Hz (Middle) along with simultaneously acquired Δ[HbT] low-pass filtered at 0.4 Hz (corresponding to the peak of cross correlation between ΔF/F and Δ[HbT] across frequencies). This trial comes from an awake, resting-state mouse and corresponds to Fig. 3B and Movies S2 and S3. The 0.4-Hz LPF serves to temporally smooth the faster repetitive neural activity seen on the Left.