Artifacts in Eighth Cranial Nerve Biopsy
- 1 January 1980
- journal article
- research article
- Published by Taylor & Francis in Acta Oto-Laryngologica
- Vol. 89 (1-2) , 71-75
- https://doi.org/10.3109/00016488009127111
Abstract
The occurrence of artifactual morphological changes was investigated in human eighth nerve biopsies and corresponding changes were brought about in biopsies from rats by mechanical handling before fixation. At the very site of compression by a pair of forceps the biopsy stained lighter than in its immediate surroundings. Electron microscopy showed denuded and fragmented axons among vesicular debris in the area. Further away the myelin coats were greatly thickened, often to the degree that the axonal canal could no longer be identified. The myelin lamellae showed separation and were occasionally seen in convoluted forms. Also variations in the diameters of the nerve fibres and ruptures of the myelin coats could be produced after mechanical handling. Zusammenfassung Das Vorkommen von artefaktuellen Veränderungen in Biopsien vom 8. Hirnnerv des Menschen wurde unter-sucht und entsprechende Veränderungen wurden in Biopsien von Ratten durch mechanische Behandlung vor der Fixation verursacht. Die Färbung der Nervenfasern war schwächer an der Stelle der Kompression als in der Umgebung. In elektronenmikroskopischen Unter-suchungen beobachtete man bare, fragmentierte Axone und vesikulares Debris. Ferner in der Umgebung beobachtete man verdickte Markscheiden und in vielen Fällen konnte man den Axon nicht mehr sehen. Die Myelinlamellen waren teilweise separiert und oft in rundliche Formationen reorganisiert. Variationen in Diametern der Nerven und Rupture der Markscheiden wurden auch nach der mechanischen Behandlung vor der chemischen Fixation beobachtet.This publication has 7 references indexed in Scilit:
- Pathologic Features of the Cochlear Nerve in Profound DeafnessJAMA Otolaryngology–Head & Neck Surgery, 1978
- Ultrastructural Features of Spiral Ganglion Cells: A Study of Patients With Hearing Loss of Varying OriginsJAMA Otolaryngology–Head & Neck Surgery, 1978
- An ultrastructural study of chronic cadmium chloride-induced neuropathyActa Neuropathologica, 1978
- Viral Culture and Electron Microscopy of Ganglion Cells in Meniere's Disease and Bell's PalsyActa Oto-Laryngologica, 1978
- Neuropathological Findings of Hemifacial Spasm and Trigeminal NeuralgiaJAMA Otolaryngology–Head & Neck Surgery, 1974
- How Long Can Degenerating Axons in the Central Nervous System Produce Reactive Changes?Published by Springer Nature ,1971
- Monosynaptic Excitation of Alpha Motoneurones from Supraspinal Structures in the CatActa Physiologica Scandinavica, 1968