Fig. 5.

The effects of kynurenic acid injections into the left and right DNLL on long-lasting inhibition of responses recorded from two separate neurons in the right and left inferior colliculus of the same rat. The neurons in the left and right inferior colliculus had CFs of 12.58 and 5.80 kHz, respectively. Positive values on thex-axis represent ipsilateral-leading-contralateral ITDs relative to the recording site in inferior colliculus. The responses to ITDs between −1.0 and +20 msec before LL injection are shown asopen circles. The responses after injection of kynurenic acid into the left DNLL are shown as open squares for both neurons. The responses after an injection into the right DNLL are shown as filled squares.