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Tonic and reflex synaptic activity recorded in ciliary ganglion cells of anaesthetized rabbits.

Publication ,  Journal Article
Johnson, DA; Purves, D
Published in: The Journal of physiology
June 1983

We have studied patterns of synaptic activity in rabbit ciliary ganglion cells by intracellular recording in vivo, and have examined the morphology of functionally characterized neurones by intracellular injection of horseradish peroxidase. Nearly all of the neurones studied (293 of 300) received tonic synaptic input from preganglionic neurones. This tonic activity was not decreased by darkness or by acute optic nerve section. The rate of tonic synaptic activity recorded in the vast majority of neurones (94%) changed in response to retinal illumination. Most ganglion cells showed an increased rate; some cells, however, showed decreased activity during illumination. The rate of synaptic activity recorded in ciliary neurones tended to be progressively higher in neurones with more complex geometries. Neurones with similar reflex properties included cells that lacked dendrites and cells with complex dendritic arborizations; conversely, neurones with similar geometries often had different reflex characteristics. The synaptic activity arising from different preganglionic axons innervating the same ganglion cell was not temporally linked in any obvious way. The relevance of these results to the regulation of the number of axons that innervate target neurones is discussed.

Duke Scholars

Published In

The Journal of physiology

DOI

EISSN

1469-7793

ISSN

0022-3751

Publication Date

June 1983

Volume

339

Start / End Page

599 / 613

Related Subject Headings

  • Synapses
  • Retina
  • Reflex
  • Rabbits
  • Physiology
  • Photic Stimulation
  • Neurons
  • Horseradish Peroxidase
  • Ganglia, Parasympathetic
  • Evoked Potentials, Visual
 

Citation

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Johnson, D. A., & Purves, D. (1983). Tonic and reflex synaptic activity recorded in ciliary ganglion cells of anaesthetized rabbits. The Journal of Physiology, 339, 599–613. https://doi.org/10.1113/jphysiol.1983.sp014737
Johnson, D. A., and D. Purves. “Tonic and reflex synaptic activity recorded in ciliary ganglion cells of anaesthetized rabbits.The Journal of Physiology 339 (June 1983): 599–613. https://doi.org/10.1113/jphysiol.1983.sp014737.
Johnson DA, Purves D. Tonic and reflex synaptic activity recorded in ciliary ganglion cells of anaesthetized rabbits. The Journal of physiology. 1983 Jun;339:599–613.
Johnson, D. A., and D. Purves. “Tonic and reflex synaptic activity recorded in ciliary ganglion cells of anaesthetized rabbits.The Journal of Physiology, vol. 339, June 1983, pp. 599–613. Epmc, doi:10.1113/jphysiol.1983.sp014737.
Johnson DA, Purves D. Tonic and reflex synaptic activity recorded in ciliary ganglion cells of anaesthetized rabbits. The Journal of physiology. 1983 Jun;339:599–613.
Journal cover image

Published In

The Journal of physiology

DOI

EISSN

1469-7793

ISSN

0022-3751

Publication Date

June 1983

Volume

339

Start / End Page

599 / 613

Related Subject Headings

  • Synapses
  • Retina
  • Reflex
  • Rabbits
  • Physiology
  • Photic Stimulation
  • Neurons
  • Horseradish Peroxidase
  • Ganglia, Parasympathetic
  • Evoked Potentials, Visual