Fig. 3.
Synaptic conductance ILD responses in the rat auditory cortex shift toward the ipsilateral ear with increasing ipsilateral sound level. A: representative example showing negative ILD response shifts to both excitatory (GE, green) and inhibitory (GI, red) conductance responses to the binaural stimulus array (cell 072810-MK-3-1). White noise bursts (25-ms duration) are indicated in gray. B and C: integrated synaptic conductance ILD curves (B: excitatory; C: inhibitory). Ipsilateral level held constant for each curve as a function of ILD. This cell was contralateral preferring and had a mean ILD response shift of −0.67 dB/dB for excitation (B; SD = 0.61) and −0.98 dB/dB for inhibition (C; SD = 0.4). D and E: population histograms showing that the majority of cells (88.5%) had negative GE response shifts (D, top left, 46/52 cells) and 94.5% of cells had negative GI response shifts (E, top left, 52/55 cells), regardless of binaural preference categorization.