Fig. 23. Distribution of human nerve fiber sizes in nerves to extraocular muscles. Ordinate, percentage of nerve fibers; abscissa, size of fibers in microns. Top, cranial nerve IV; bottom, cranial nerve VI. (Torre M: Nombre et dimensions des unites motrices dans les muscles extrinsiques de l'oiel. Schweiz Arch Neurol Neurochir Psychiatrie 72: 362, 1970.)