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December 1934

Intercortical Systems of the Human Cerebrum.

Arch NeurPsych. 1934;32(6):1370-1371. doi:10.1001/archneurpsyc.1934.02250120247023

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This monograph represents some of the results of a serious and sustained attack on problems connected with the architecture of the association fiber systems of the human cerebrum. For following out the intercortical systems the author has devised a special procedure, which he calls automatic internal dissection. With this method a brain is placed in a steel container and subjected to a pressure of 1,000 pounds (453.6 Kg.) for one or two days. The valve is then quickly opened; this allows an internal explosion of the tissue. When the brain is examined it is found to be dissected along natural lines of cleavage. A study of these preparations shows that the intercortical fiber systems underlie the fissures and sulci and are lacking, for the most part, beneath the gyri. In addition, there are deep fiber sheets which are continuous beneath the bases of both the sulci and the gyri. These