Fig. 4

Examples of LFPs recorded at channel 29 from the left cortex of rat 1803. The stimulus were “sparse” ITD stimulus pulse trains (consisting of only four binaural pulses) at 300 Hz. The lines show mean ± standard error of the LFP responses recorded when either all four ITDs were + 0.164 ms (red line) or when all were − 0.164 ms (blue line). In this particular example, left ear leading ITDs gave the stronger response, even though this channel was recorded on the left side, contrary to the expectation that cortical neurons generally prefer sound source locations from the contralateral side. ECoG channels which defied that expectation were not uncommon in our dataset