Fig. 4.

Perceptual modulation measured in the LFP power, same conventions as Fig. 3. (A Left) The mean power in the α-band range (9–14 Hz) is strongly modulated by the perceived visibility of the target on test trials. (A Right) There is a strong site-to-site correlation between the strength of the response to physical removal and that to perceptual suppression. The response magnitudes of physical and subjective modulation are approximately equal. (B) Gamma range (30–50 Hz) power modulation closely resembles the pattern observed in the MUA in Fig. 3, correlated in area V4. Slopes of the regression are plotted at the bottom the figures (Sl). ∗∗, P < 0.01.