Caudal spinal cord of the teleost Sternarchus albifrons resembles regenerating cord

The Anatomical Record
M J Anderson, S G Waxman

Abstract

The morphology of spinal cord in the caudal-most spinal segments of normal adult Sternarchus albifrons is different from that of more rostral adult cord. The caudal segments are strikingly similar to the regenerating spinal cord observed after amputation of the tail in Sternarchus. In the caudal-most vertebral segment of normal spinal cord, ependymal cells are radially enlarged and are more numerous than in more rostral adult cord. Large processes of the ependymal cells extend into the central canal, which also contains a prominent Reissner's fiber. Invaginations of the outer surface of the spinal cord, with the associated basal lamina, are common. Lateral to the immediate ependymal layer, extracellular spaces contain longitudinally oriented neurites. Cell bodies and cell processes filled with dense-cored vesicles occur throughout the caudal-most segment of spinal cord, and are especially concentrated in the ventral half, interspersed with numerous capillaries. In all these respects the caudal-most segments of normal adult spinal cord in Sternarchus closely resemble regenerating spinal cord of Sternarchus. In both regions, at least some of the ependymal cells retain the ability to divide and generate new neurons and glial cells.

References

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Citations

Aug 1, 1995·Cellular and Molecular Neurobiology·H S Yin
Feb 1, 1987·Developmental Biology·M J AndersonH L Fong
Jun 1, 1985·Brain Research·M J Anderson, S G Waxman
Jan 15, 1991·Brain Research. Developmental Brain Research·W A SmitE H Velzing
Nov 1, 1995·Biological Reviews of the Cambridge Philosophical Society·A J LarnerR J Keynes
Sep 27, 2002·Seminars in Cell & Developmental Biology·Ellen A G ChernoffRachel E Karcavich
Feb 1, 1993·In Vitro Cellular & Developmental Biology : Journal of the Tissue Culture Association·M J Anderson
Oct 1, 2008·Archives of Orthopaedic and Trauma Surgery·Yasuo SaruhashiMineko Fujimiya
Jan 1, 1985·Annals of the New York Academy of Sciences·M J Anderson, S G Waxman
Mar 6, 2003·The Journal of Comparative Neurology·Adrian G Dervan, Barry L Roberts
Jan 1, 1983·The Anatomical Record·M J AndersonM Laufer
Oct 12, 2010·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Subhra Prakash HuiSukla Ghosh
Sep 10, 2005·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Kate F Barald
Oct 17, 2017·Journal of Theoretical Biology·Iulian IlieşGünther K H Zupanc
Jun 14, 2013·The Journal of Experimental Biology·Graciela A Unguez

Related Concepts

Ependyma
Nerve Regeneration
Spinal Cord
Tail

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