Orientation tuning of visual cortex neurons.

<p>(A) Top row: Polar plots show raw tuning curves and curve fits (dotted lines) of significantly orientation-tuned neurons in the awake condition. Bottom row: Idem, but for the same neurons under anesthesia. Scale bar measures 2% ΔF/F. (B) Distributions of preferred directions. No significant differences were found between awake and anesthesia. (C) Mean (± SEM) direction selectivity index (DSI). (D) ΔF/F response to the preferred direction. (E) ΔF/F response to the null direction. (F) Mean orientation selectivity index (OSI). (G) Mean tuning curve bandwidth. (H) Average (± SEM) ΔF/F response to visual stimulation by preferred (left panel) and null direction (right panel) across cells as a function of time around stimulus onset. All panels: Red bars and lines indicate data from the awake condition, blue bars and lines represent data from the anesthetized condition (* p = 0.014, *** p = 0.00017).