Abstract
The sciatic/tibial/plantar nerve complex of normal aged rats displays striking morphological changes that are most pronounced distally. Nerve fiber abnormalities include: (a) large numbers of axonal glycogenosomes, mitochondria, dense membranous bodies, and decorated particles; (b) adaxonal Schwann cell processes sequestering portions of axoplasm; (c) swollen demyelinated and remyelinated axons, some encircled by supernumerary cellular processes; and (d) collagen pockets, denervated Schwann cell columns, and empty basal laminae. Abnormalities a and b were encountered with increasing frequency on descent through the tibial and plantar nerves. Abnormalities b, c, and d were found in lateral and medial plantar nerves, where they were associated with an enlarged endoneurial space. Found in animals kept in cages with smooth or wire-mesh floors, the incidence of these changes increased with advancing age. They are attributed to trauma and ischemia from chronic pressure on the plantar nerve.
Original language | English (US) |
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Pages (from-to) | 155-265 |
Number of pages | 111 |
Journal | Journal of Neuropathology and Experimental Neurology |
Volume | 40 |
Issue number | 2 |
DOIs | |
State | Published - Mar 1981 |
Externally published | Yes |
ASJC Scopus subject areas
- Pathology and Forensic Medicine
- Neurology
- Clinical Neurology
- Cellular and Molecular Neuroscience