Experimental autoimmune myasthenia gravis: No morphometric abnormalities of nerve trunks

In rats with experimental autoimmune myasthenia gravis, light and electron microscopic evaluation of proximal and distal radial and distal phrenic nerve trunks was done to see whether a morphologic abnormality was present in alpha motor axons. No significant difference was found in density of myelinated fibers between nerves of experimental and control animals.