Axonal Function and Ionic Regulation in the Central Nervous System of a Phytophagous Insect (Carausius Morosus)
Open Access
- 1 October 1967
- journal article
- research article
- Published by The Company of Biologists in Journal of Experimental Biology
- Vol. 47 (2), 235-247
- https://doi.org/10.1242/jeb.47.2.235
Abstract
1. Experiments vising intracellular and extracellular recording techniques indicate that, despite the specialized ionic composition of the haemolymph, the axons in the nerve cord of Carausius are conventional in that the action current is largely carried by sodium ions. 2. This effect is achieved by an appreciable regulation of the concentrations of inorganic ions in the extracellular fluid bathing the axon surfaces. 3. The extra-axonal regulation does not appear to result from any significant restriction in the accessibility of cations to the general extracellular system, but from a local regulation which appears to maintain a relatively high concentration of sodium ions at the axon surfaces. 4. It is suggested that such a regulation may be achieved by an extrusion of sodium ions from the glial cells into the restricted extra-axonal spaces demonstrated in the electron micrographs of this preparation.This publication has 18 references indexed in Scilit:
- Membrane Potentials in the Central Nervous System of a Phytophagous Insect (Carausius Morosus)Journal of Experimental Biology, 1967
- The ultrastructure of the perineurium in two insect species, carausius morosus and periplaneta americanaJournal of Cell Science, 1967
- A Neural Fat-body Sheath in a Phytophagous Insect (Carausius morosus)Nature, 1966
- Tetrodotoxin Blockage of Sodium Conductance Increase in Lobster Giant AxonsThe Journal of general physiology, 1964
- An Acid Mucopolysaccharide in Cockroach GangliaNature, 1961
- Integrative Synaptic Mechanisms in the Caudal Ganglion of the CrayfishThe Journal of general physiology, 1960
- EFFECTS OF EXTERNAL IONS ON MEMBRANE POTENTIALS OF A CRAYFISH GIANT AXONThe Journal of general physiology, 1959
- Experimentally altered structure related to function in the lobster axon with an extrapolation to molecular mechanisms in excitationJournal of Cellular and Comparative Physiology, 1958
- The effect of ions upon neuromuscular transmission in a herbivorous insectThe Journal of Physiology, 1957
- PROPERTIES OF THE CONNECTIVE TISSUE SHEATH OF THE COCKROACH ABDOMINAL NERVE CORD ,The Biological Bulletin, 1956