Fig. 5.

Spontaneous activities and phasic responses to whisker deflection in barrel cortex of anesthetized control mice. A and C: extracellular and sharp electrode intracellular recordings show repetitive spike trains without whisker deflection. The spike train results from a sustained membrane depolarization (E, bottom trace). B and D: extracellular and intracellular recordings show phasic responses to whisker deflection. Note that the spike is induced by a short EPSP (D), and superimposed 5 traces (F) indicate the EPSPs are of similar latencies.