Acta Neuropathologica

, Volume 77, Issue 4, pp 343–349

Evidence for sequential degeneration of the neurons in the intermediate zone of the spinal cord in amyotrophic lateral sclerosis: a topographic and quantitative investigation

  • K. Oyanagi
  • F. Ikuta
  • Y. Horikawa
Regular Papers

DOI: 10.1007/BF00687368

Cite this article as:
Oyanagi, K., Ikuta, F. & Horikawa, Y. Acta Neuropathol (1989) 77: 343. doi:10.1007/BF00687368


To elucidate the degenerating mechanism of the neurons in the intermediate zone of the spinal cord in classical amyotrophic lateral sclerosis (ALS), the spinal neurons in a patient with ALS, whose muscular strength was fairly well preserved up to death, were examined quantitatively and topographically, and compared with the data of advanced ALS patients and age-matched control subjects reported previously. In advanced ALS patients, anterior horn cells completely disappeared and the medium-sized (nuclear area; 71–150 μm2) and large (nuclear area; greater than 151 μm2) neurons in the intermediate zone were severely reduced. In the present case, however, the loss of anterior horn cells was severe but the degree was not equal to that of advanced ALS patients, and the neurons in the intermediate zone were quite well preserved. The finding indicates that the primary degeneration may occur in the anterior horn cells and the neurons in the intermediae zone degenerate sequentially in the spinal gray matter in ALS.

Key words

ALSSpinal cordPropriospinal neuronAnterior horn cellQuantitative study

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • K. Oyanagi
    • 1
  • F. Ikuta
    • 2
  • Y. Horikawa
    • 3
  1. 1.The Center for Materials of Brain Diseases, Brain Research InstituteNiigata UniversityNiigataJapan
  2. 2.Department of Pathology; Brain Research InstituteNiigata UniversityNiigataJapan
  3. 3.Department of NeurologyShinrakuen HospitalNiigataJapan