抄録
Tonotopic organization and, in particular, the isofrequency planes in the brainstem audi-tory nuclei of the rat were studied by the 14C-2-deoxyglucose (2DG) method. With wideband noise stimulation, 2DG labeling was seen diffusely in the brainstem auditory nuclei, but with pure or complex tone stimulation, labeling of narrow 2DG-uptake bands were seen in the cochlear nucleus and inferior colliculus, each band corresponding to the frequency component of the stimuli. In the superior olivary complex, the nuclei of the lateral lemniscus, and the medial geniculate body, labeling with the pure tones was not so selective as that in the cochlear nucleus and inferior colliculus. The iso-frequency contours in the cochlear nucleus and inferior colliculus were studied in serialfrontal and sagittal sections of the brain and three-dimensional structures of the iso-frequency planes in these nuclei were analyzed.
