The intracranial portion of the right oculomotor nerves was extracted from six adult German Shepherd dogs. The nerves were studied using light
and electron microscopy. Nerve area was calculated, and myelinated and unmyelinated fibers were analized to determine number, diameter and area.
Also in the myelinated fibers the area and diameter of the correspondent axon, and thickness of the myeline sheath were measured. The mean
number of fibers was 8543.50±1231.85 for myelinated and 1402.00±241.58 for unmyelinated. The mean fiber diameter was 10.23±0.68 μm for
myelinated and 0.43±0.21 μm for unmyelinated. This study demonstrated that the oculomotor nerves in dogs have structural and ultrastructural
characteristics that are similar to those from other specie
