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Structural mechanisms to produce differential dendritic gains.

Publication ,  Journal Article
Lee, DC; Jensen, AL; Schiefer, MA; Morgan, CW; Grill, WM
Published in: Brain research
February 2005

The axons of sacral parasympathetic preganglionic neurons (PGNs) originate on a primary dendrite between 10 and 110 mum from the soma. Therefore, it was hypothesized that the location of the axon origin would impact the relative efficacy of ipsilateral and contralateral synaptic inputs. The morphology of two PGNs was reconstructed, and the transfer impedance was used to quantify the influence of synaptic inputs on the transmembrane potential at the axon initial segment. The ratio of ipsilateral transfer impedance to contralateral transfer impedance (termed the relative gain) was increased by 14-29% for axons originating from the dendrite vs. axons originating from the soma. The addition of 50 synchronized "gating" synapses on the proximal dendrites increased the relative gain by 17-38% when the axon originated from the dendrite, but only by 11-15% when the axon originated from the soma. The efficacy of synaptic inputs and the ability of proximal gating synapses to regulate synaptic efficacy were strongly influenced by the site of origin of the axon. The position of axon origin is an effective structural mechanism to regulate the relative efficacy of synaptic inputs arriving at different locations on the dendritic tree.

Duke Scholars

Published In

Brain research

DOI

EISSN

1872-6240

ISSN

0006-8993

Publication Date

February 2005

Volume

1033

Issue

2

Start / End Page

117 / 127

Related Subject Headings

  • Synapses
  • Neurology & Neurosurgery
  • Dendrites
  • Cell Size
  • Cats
  • Axons
  • Animals
  • Action Potentials
  • 5202 Biological psychology
  • 3209 Neurosciences
 

Citation

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ICMJE
MLA
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Lee, D. C., Jensen, A. L., Schiefer, M. A., Morgan, C. W., & Grill, W. M. (2005). Structural mechanisms to produce differential dendritic gains. Brain Research, 1033(2), 117–127. https://doi.org/10.1016/j.brainres.2004.11.034
Lee, Dongchul C., Alicia L. Jensen, Matthew A. Schiefer, Charles W. Morgan, and Warren M. Grill. “Structural mechanisms to produce differential dendritic gains.Brain Research 1033, no. 2 (February 2005): 117–27. https://doi.org/10.1016/j.brainres.2004.11.034.
Lee DC, Jensen AL, Schiefer MA, Morgan CW, Grill WM. Structural mechanisms to produce differential dendritic gains. Brain research. 2005 Feb;1033(2):117–27.
Lee, Dongchul C., et al. “Structural mechanisms to produce differential dendritic gains.Brain Research, vol. 1033, no. 2, Feb. 2005, pp. 117–27. Epmc, doi:10.1016/j.brainres.2004.11.034.
Lee DC, Jensen AL, Schiefer MA, Morgan CW, Grill WM. Structural mechanisms to produce differential dendritic gains. Brain research. 2005 Feb;1033(2):117–127.
Journal cover image

Published In

Brain research

DOI

EISSN

1872-6240

ISSN

0006-8993

Publication Date

February 2005

Volume

1033

Issue

2

Start / End Page

117 / 127

Related Subject Headings

  • Synapses
  • Neurology & Neurosurgery
  • Dendrites
  • Cell Size
  • Cats
  • Axons
  • Animals
  • Action Potentials
  • 5202 Biological psychology
  • 3209 Neurosciences