[Distribution of association fibers impinging upon the middle suprasylvian sulcus area (MSs area) in the cat (author's transl)].

Following lesions of various cortical areas of altogether 13 adult cats, the distribution of degenerating fibers in the cortical area surrounding the middle suprasylvian sulcus (MSs area) has been studied with the method of Fink and Heimer. Association fibers from the visual cortex mostly end in the vicinity of fundus of the medial wall of the MSs area and a fair number of fibers do in the fundus area of the posterior portion of its lateral wall. Most of the fibers terminate in layers III-V. Fibers from the auditory cortex terminante in the lip of the lateral wall, while few fibers end in the fundus and the medial wall. The fibers from the somatosensory cortex chiefly end in the vicinity of the fundus terminate in layers III-V. The "association cortex" sends a good amount of fibers to the lip region and the upper area of the media wall and lesser amount to the posterior part of the lateral wall of the MSs. The fibers terminant in layer III. From the present and the previous findings, it has become evident that inputs of different kinds of sensory modalities converge upon th elayers III-IV of the MSs area from the various cortical functional areas, and that the MSs area also sends fibers back to the sensory cortical areas. In addition, it has reciprocal connections with some thalamic nuclear groups, e.g., the "pulvinar posterior" system. Based upon the findings of neuronal connections, it can be suggested that the MSs area may play an important role with regard to the "integration of sensory inputs" in the cat cerebral cortex.