Slowly migrating granule cell with descending processes near the EGL–ML border. A, The highly motile processes having lamellipodia-like structure (open arrows) and filopodia (white arrows), extended from the cell body. During the process extension, the horizontally oriented cell body (asterisks) exhibited the tangential movement toward the right hemisphere of the cerebellum at a significantly reduced rate of 3.8 μm/hr. Time interval (in minutes) is indicated on the bottom left of each photograph. Scale bar, 10 μm. The total distance traversed by the granule cell soma (B), the direction and distance traveled by the soma during each 5 min of the testing period (C), and the length/width ratio of the soma (D) were plotted as a function of elapsed time.