[Patterns of the reaction of the inferior colliculus to the movement of a sound source in the cat].

Series of slicks simulating source sound movement caused 82% of the posterior colliculus' EPs to alter gradually their amplitude and/or shape ("the movement effect"). The markedness of ipsilateral effect was about 1.5 times higher than that of the contralateral one. The effect occurred within large range of velocities: no lower than 3.4 rad/sec in 65% of observations. The most effective were the velocities over 6.8 rad/sec in 78%. Difference in responses to opposite directions of the sound source movement occurred in 26%. The movement effect obviously depended on the site of EP recording.