Crayfish Motor Axons Research Articles

Recording of action potentials and polarization of a single crayfish motor axon through a sucrose-gap capillary suction electrode.

A capillary suction electrode was developed which contains in its tip a sucrose-gap. The nerve fiber is pulled by negative pressure through the closely fitting openings of an outer and an inner capillary. The space between these openings is o.1 mm wide and can be perfused with sucrose solution. Because of the small physical size of the electrode tip the electrode can be used to record from single unmyelinated nerve fibers in small preparations in combination with other electrodes or transducers.

Neural geometry and activation of crayfish fast flexor motoneurons.

Neural geometry and activation of crayfish fast flexor motoneurons.A I Selverston, and M P RemlerA I Selverston, and M P RemlerPublished Online:01 Nov 1972https://doi.org/10.1152/jn.1972.35.6.797MoreSectionsPDF (4 MB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInWeChat Previous Back to Top Next Download PDF FiguresReferencesRelatedInformation Cited ByLoss of Escape-Related Giant Neurons in a Spiny Lobster, Panulirus argusThe Biological Bulletin, Vol. 211, No. 3Loss of escape responses and giant neurons in the tailflipping circuits of slipper lobsters, Ibacus spp. (Decapoda, Palinura, Scyllaridae)Arthropod Structure & Development, Vol. 33, No. 2Regenerating crayfish motor axons assimilate glial cells and sprout in cultured explants29 July 2003 | The Journal of Comparative Neurology, Vol. 464, No. 4Muscle Fibers in Regenerating Crayfish Motor NervesJoanne Pearce, Kristin M. Krause, and C. K. Govind1 December 1997 | Journal of Neurophysiology, Vol. 78, No. 6Characterization of a P-Type Calcium Current in a Crayfish Motoneuron and Its Selective Modulation by Impulse ActivitySungwon J. Hong, and Gregory A. Lnenicka1 January 1997 | Journal of Neurophysiology, Vol. 77, No. 1Long-term changes in the neuromuscular synapses of a crayfish motoneuron produced by calcium influxBrain Research, Vol. 605, No. 1Granule containing cells in the crayfish third abdominal ganglionComparative Biochemistry and Physiology Part A: Physiology, Vol. 101, No. 3Relationships between cell size and nuclear morphology in crayfish neuronsTissue and Cell, Vol. 24, No. 2Concanavalin A blocks the Ca2+-dependence of crayfish muscle fiber responses to glutamateBrain Research, Vol. 243, No. 1Synaptic interaction between the giant interneuron and the giant motorneuron in the hermit crab, Pagurus pollicarusComparative Biochemistry and Physiology Part A: Physiology, Vol. 68, No. 1Role of long-lasting neuromuscular depression in muscle activity in crayfishComparative Biochemistry and Physiology Part C: Comparative Pharmacology, Vol. 66, No. 2Direct evidence for a presynaptic action of glutamate at a crayfish neuromuscular junctionBrain Research, Vol. 156, No. 2The morphology of identified neurons in the abdominal ganglion of aplysia californicaBrain Research, Vol. 112, No. 2A radioautographic analysis in the light and electron microscope of identified Aplysia neurons and their processes after intrasomatic injection of l-[3H]fucoseBrain Research, Vol. 112, No. 2Organization and synaptic physiology of crustacean neuromuscular systemsProgress in Neurobiology, Vol. 7Crayfish neurons with electrogenic cell bodies: correlations with function and dendritic propertiesBrain Research, Vol. 85, No. 1 More from this issue > Volume 35Issue 6November 1972Pages 797-814 https://doi.org/10.1152/jn.1972.35.6.797PubMed4654251History Published online 1 November 1972 Published in print 1 November 1972 Metrics

Degeneration and regeneration in abdominal flexor motor neurons in the crayfish.

AbstractElectrophysiological studies of sectioned crayfish motor axons of the abdominal flexor muscle have demonstrated that the distal stumps, isolated from their central connections for up to several months, are remarkably resistant to degeneration, as previously shown in the crayfish claw opener preparation. These distal stumps remained electrically excitable and intracellular recording showed that their neuromuscular junctional properties were indistinguishable from normal ones in such properties as waveform and amplitudes of the evoked junctional potentials. Furthermore, repetitive stimulation of the distal stumps evoked jp's which showed facilitation as in normal preparations. When degeneration finally occurred, electrical stimulation of the nerve no longer evoked jp's, and no progressive deterioration of junctional properties was observed.Regeneration ultimately occurred in these nerves but required at least three weeks or more. The electrical properties of these regenerated junctions were not different from normal ones.The evidence from time‐course and correlated histological studies of degeneration and regeneration suggest that regeneration of these crayfish nerves occurs by axonal fusion rather than by outgrowth of an entirely new distal apparatus from centrally located cell bodies, as is the mechanism in vertebrates and some invertebrates.

Regeneration in crustacean motoneurons: evidence for axonal fusion.

Crayfish motor axons remain excitable for over 100 days after severance from their central cell bodies, and continue to store and release normal amounts of transmitter substance. Evidence indicates that regeneration occurs by fusion of the central process with its surviving peripheral segment.