“…By 1915, not only had the presence of axonal degeneration in the lesions of MS been well established, but also the changes axons undergo during different stages of the disease had been described: axonal swellings (2, 7-10, 15, 21-23, 28, 30, 35, 41, 46, 50), alternating constrictions and dilatations (2,9,22,35,41) and transections (2,22,28,35,46) in actively demyelinating lesions ("Körnchenzellen," myelin debris containing macrophages were defined as a characteristic of "fresh" lesions; reviewed by Siemerling and Raecke (52)) as well as decrease of the axonal diameter in chronic plaques (23,41,47) (Figure 1). Thus, it was generally accepted that the bulk of acute axonal injury appeared in the early stage of the disease.…”