STRUCTURE OF SOME DEEP REGIONS OF THE HUMAN CEREBELLAR VERMIS WHITE-MATTER

Eight branches of the white matter form ten lobules of the cerebellar vermis. Sometimes two or three branches begin with common portion of white matter. Purpose -to determine the structure of regions of white matter of the cerebellum that are common to several of its branches. 230 cerebella -the object of study, age 20-99 years. The cerebellum was dissected strictly on the central sagittal plane and photographed. Digitized images were analyzed. Common origin of the two branches does not have own leaf of gray matter. Common trunk has one or two leaf of gray matter. When four sheets, there is a symmetrical arrangement of the top and bottom sheets. In a few observations found five and seven sheets of gray matter. Trunk that is common to the sixth and seventh branches. On its lower surface always lies own leaf of gray matter. In 84% of the objects have two of their own leaves of gray matter lying usually mirror -one on top, one -from the bottom. Trunk of white matter common to the fifth and sixth branches starting from the trunk common to the fifth, sixth, and seventh branches half the cases. Offered their names. Thus, the trunk, common for the third and fourth branches truncus communis r. paleocerebellaris superioris III-IV, or truncus paleocerebellaris superior. Since rays of branches form lobules III and IV-V, it can be designated as a truncus communis ll. III-V. Trunk, from which begin with the fifth and sixth branches -truncus communis r. V-VI, or truncus communis ll. VI-VIII. The trunk common for the sixth and seventh branches -truncus communis paleocerebellaris inferior, or truncus communis r. VI-VII, or truncus communis lobules VIII-IX. Trunk, from which start with three branches, the fifth and sixth and seventh, -truncus communis r. V-VII, or truncus communis lobules VI-IX.