A SYSTEM OF PARALLEL SEPTA IN CRAYFISH NERVE FIBERS
Open Access
- 1 January 1970
- journal article
- Published by Rockefeller University Press in The Journal of cell biology
- Vol. 44 (1), 125-133
- https://doi.org/10.1083/jcb.44.1.125
Abstract
Certain axons in the abdominal roots and nerve cord of crayfish contain a system of regularly spaced, parallel transverse septa with a periodicity of about 2 micro. Each septum is composed of two roughly parallel membranes, separated by a gap of 150-400 A. The two membranes are frequently fenestrated by pores 550-2000 A in diameter, each occupied by a microtubule. Filaments are occasionally seen bridging the gap between the microtubule and the edge of the pore. The membranes of the septa are continuous with longitudinal membranous tubules. In small- and medium-sized axons the septa are continuous across the axon, while in large axons they seem to be intact only at the periphery as annuli. It is suggested that such structures be called "fenestrated septa." With horseradish peroxidase as a tracer, no communication between the septal lumen and the periaxonal space was found.Keywords
This publication has 6 references indexed in Scilit:
- Fine structure and organization of nerve fibers and giant axons in Homarus americanusJournal of Ultrastructure Research, 1968
- Structural Aspects of Saltatory Particle MovementThe Journal of general physiology, 1967
- THF EARLY STAGES OF ABSORPTION OF INJECTED HORSERADISH PEROXIDASE IN THE PROXIMAL TUBULES OF MOUSE KIDNEY: ULTRASTRUCTURAL CYTOCHEMISTRY BY A NEW TECHNIQUEJournal of Histochemistry & Cytochemistry, 1966
- A SIMPLIFIED LEAD CITRATE STAIN FOR USE IN ELECTRON MICROSCOPYThe Journal of cell biology, 1965
- Some aspects of the structural organization of the arthropod gangliaCell and tissue research, 1962
- The Fine Structure of a Special Type of Nerve Fiber Found in the Ganglia of Armadillidium vulgare (Crustacea-Isopoda)The Journal of cell biology, 1960