| Type | MGI:General | Description | focal spheroid axon swellings often occur in several cranial motor nerves and in the ventral horns of the spinal cords beyond 7 months of age mutants show features of Wallerian degeneration, including shrunken vacuolated axoplasm, disorganized neurofilaments, few abnormal mitochondria, endoneural fibrosis, and infiltration of macrophages |