Figure 3.

Dissecting different components of excitatory input to a L4 neuron. A, Left, Illustration of the strategy to obtain different components of excitatory input. Middle, TRFs of excitatory responses of an example P16 neuron in the normal condition (top), after cortical silencing (middle), and after subtracting thalamocortical excitation from the total excitation (bottom). Tuning curves at 20 dB above the intensity threshold are outlined with red (total excitation), black (thalamocortical), and blue (intracortical) curves, respectively, within the red box. Right, Color map for synaptic amplitudes in the frequency-intensity space (top) and responses evoked by the CF tone in three trials (bottom). B, Recording from an example P22 neuron. Data are displayed in a similar manner as in A.