The acoustic evoked brainstem potential of the cat. An experimental study

In 15 cats, the brainstem auditory evoked potentials were registered in far-field and near-field technique after surgical exposure of the rhomboid fossa. By alterations of the stimulus side and change in position of the registration electrodes on the one hand as well as by tract severance on the other hand, some interesting findings could be obtained never published before. Our investigations indicate that the far-field potentials registered from the scalp are generated axonally and constitute summation potentials of several generators. Accordingly, one should not refer to individual generators with regard to the scalp potentials, but rather to brainstem segments in which the individual potentials are generated.