Postmitotic granule cell extending its voluminous leading process without active cell movement. A, In the middle level of the EGL, the cell body of a granule cell (white asterisks) remained stationary for >3 hr, while its voluminous leading process (white arrows) extended continuously. Time interval (in minutes) is indicated on the top leftof 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), the leading process length (D), and changes in the leading process length during each 5 min of the testing period (E) were plotted as a function of elapsed time.