Population data measuring the effect of barrel cortex response enhancement and suppression on superior colliculus responses driven by fictive whisking. A, B, The amplitudes of peak1 (A) and peak2 (B) FP responses measured from the prestimulus baseline in superior colliculus during control (closed circles), application of bicuculline in barrel cortex to enhance the evoked response (open triangles), during application of lidocaine in barrel cortex to suppress the evoked response (closed squares). *Statistical differences (Tukey) between control and bicuculline; #statistical differences (Tukey) between control and Lido. C, D, Similar to A and B, but show the area of peak1 (C) and peak2 (D) rectified MUA responses measured from the prestimulus baseline in superior colliculus.