title: [The ultrastructure of the endings of nerve fibers of ordinary hairs of mammals under normal conditions and during degeneration and regeneration].
abstract: At ultrastructural level, three zones are distinguished of the palisade endings of nerve fibers, most of them in contact with the basement membrane of the outer epithelial sheath of the radix pili on rat muzzle. After division of the supplying nerve (n. infraorbitalis) in test animals of the same species, its nerve fibers and palisade endings undergo degeneration, followed by regeneration within 4-5 months. Changes in the ultrastructure of the mentioned nerve elements are thoroughly studied and demonstrated in the course of the two processes. While within 6...12 days of the operation, the palisade endings degenerate, 130 days after the intervention most of them are restored and exhibit an appreciable difference relative to their typical ultrastructure in normal state. The Schwann's cells processes, enveloping degenerated and regenerated palisade endings, similarly display marked fine-structure alterations.
mesh_terms: D000818:Animals; D001485:Basement Membrane / Q000648:ultrastructure; D003599:Cytoskeleton / Q000648:ultrastructure; D006197:Hair; D008046:Lip / Q000294:innervation*; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D009410:Nerve Degeneration; D009412:Nerve Fibers / Q000648:ultrastructure*; D009416:Nerve Regeneration; D011817:Rabbits; D051381:Rats; D012583:Schwann Cells / Q000648:ultrastructure
vernacular_title: Die Ultrastruktur der Endigungen der Nervenfasern an den gewöhnlichen Haaren der Säugetiere unter normalen Bedingungen und während der De- und Regeneration.