Abstract
The limits of the cortical area giving oscillographic responses to brief sound stimuli (clicks) were detd. by carefully moving the lead electrodes over the surface of the temporal lobe in the cat. Two expts. are described together with histological findings in these brains. The area was found to occupy the medial ectosylvian gyrus, the posterior part of the anterior ectosylvian gyrus and the superior part of the sylvian gyrus. The boundaries thus deliminated conform to cytoarchitectonic boundaries. The presence or absence of cytoarchitectural subdivisions within the area was not detd.