PMID: 6972797Jun 1, 1981Paper

Ultrastructure of migrating spinal motoneurons in anuran larvae

Brain Research
I W Chu-WangP B Farel

Abstract

Motoneurons in the course of migration to the lateral motor column (LMC) were identified by horseradish peroxidase (HRP) applied to lumbar ventral roots in anuran larvae (Rana catesbeiana). The ultrastructural characteristics of these migrating motoneurons were compared with motoneurons in the LMC that had completed their migration. Both migrating and LMC motoneurons tended to be bipolar with one process extending toward the ependyma and the other out towards the ventral root. Typically, centrally and peripherally directed processes in both migrating and LMC motoneurons contained many microtubules, mitochondria and rosette-like clusters of ribosomes, as did the soma. Four of the five types of synapses found on adult frog motoneurons were also found on migrating motoneurons in tadpoles. Radial glia, whose cell bodies are located in the ependyma, have processes extending to the spinal cord periphery. In less than 10% of the preparations, radial glia were labeled with the HRP reaction product. These labeled glia were further distinguished from migrating motoneurons at the ultrastructural level by the presence of abundant filaments.

Citations

Jan 1, 1987·Anatomy and Embryology·H L CampbellJ C Bresnahan
Mar 20, 2013·International Journal of Peptides·M Rajeswari Prabha, B Ramachandramurty
Jul 8, 1990·The Journal of Comparative Neurology·W D Snider, V Palavali
Sep 8, 1988·The Journal of Comparative Neurology·R W OppenheimH Yaginuma
Aug 20, 1982·The Journal of Comparative Neurology·C J Forehand, P B Farel
Aug 20, 1982·The Journal of Comparative Neurology·C J Forehand, P B Farel
Jan 8, 1998·The Journal of Comparative Neurology·M L Meeker, P B Farel
Jan 22, 1991·The Journal of Comparative Neurology·N HolderD A Tonge
Dec 1, 1986·The Journal of Comparative Neurology·P B Farel, S E Bemelmans
Jul 8, 1987·The Journal of Comparative Neurology·P B Farel

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