Figure 3.

Effect of barrel cortex response enhancement and suppression on superior colliculus responses driven by fictive whisking. A, Example of FP responses recorded in the barrel cortex (BCx; thin traces, top) and superior colliculus (SC; thick traces, bottom) evoked by passive touch (puff), whisking movement (whisk), and active touch (g60) during control (black), application of BMI in barrel cortex to enhance the evoked response (red), and during application of Lido in barrel cortex to suppress the evoked response (green). Note that peak2 responses in superior colliculus are enhanced and suppressed in unison with corresponding changes in the barrel cortex response, whereas peak1 responses remain relatively unaffected. B, Similar to A, but in this experiment MUA is measured in superior colliculus. C, Whisker movement measured with video tracking during fictive whisking.