Cited by 50Fractional Differential Equations Solutionsstochastic dynamics and bifurcationNeuroscience and Neuropharmacology Research

Diffusion laws in dendritic spines

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Holcman, David, Schuss, Zeev·2011·The Journal of Mathematical Neuroscience

Abstract

Dendritic spines are small protrusions on a neuronal dendrite that are the main locus of excitatory synaptic connections. Although their geometry is variable over time and along the dendrite, they typically consist of a relatively large head connected to the dendritic shaft by a narrow cylindrical neck. The surface of the head is connected smoothly by a funnel or non-smoothly to the narrow neck, whose end absorbs the particles at the dendrite. We demonstrate here how the geometry of the neuronal spine can control diffusion and ultimately synaptic processes. We show that the mean residence time of a Brownian particle, such as an ion or molecule inside the spine, and of a receptor on its membrane, prior to absorption at the dendritic shaft depends strongly on the curvature of the connection of the spine head to the neck and on the neck's length. The analytical results solve the narrow escape problem for domains with long narrow necks.

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  • Modeling studies have often emphasized the interesting effects that shape can have on the diffusion of proteins, calcium ions and other signaling molecules.

    “Nevertheless, modeling studies have often emphasized the interesting effects that shape can have on the diffusion of proteins, calcium ions and other signaling molecules (Holcman and Schuss, 2011).”

    From Barriers in the brain: resolving dendritic spine morphology and compartmentalization (2014) · cites this paper as Holcman and Schuss, 2011

  • Modeling studies show that typical mushroom-like morphology strongly alters lateral diffusion of AMPA receptors, with pronounced suppression of receptor exit rate out of spines with decreasing neck radius and increasing neck length.

    “These observations have been rationalized by several modeling studies, which showed that the typical mushroom-like morphology of dendritic spines strongly alters the lateral diffusion of AMPA receptors, demonstrating a pronounced suppression of the receptor exit rate out of spines with decreasing neck radius as well as increasing neck length (Holcman and Schuss, 2011; Kusters et al., 2013; Kusters”

    From Barriers in the brain: resolving dendritic spine morphology and compartmentalization (2014) · cites this paper as Holcman and Schuss, 2011

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  1. Schuss Z Diffusion and Stochastic Processes: An Analytical Approach 2010 New York: Springer

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Authors
Holcman, D., & Schuss, Z.
Affiliations
  • École Normale Supérieure - PSL (FR)
  • Tel Aviv University (IL)
Corresponding author
Holcman, David
Venue
The Journal of Mathematical Neuroscience
Published
2011
Volume
1
Issue
1
Pages
10
ISSN
2190-8567 (ISSN-L)
OpenAlex
W2140435774
Cited by
50
References
64
Citations by year
2025: 2 · 2023: 1 · 2022: 4 · 2021: 3 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 5 · 2016: 3 · 2015: 5 · 2014: 10 · 2013: 7 · 2012: 5
FWCI
7.71
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • The Journal of Mathematical Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Mathematics › Modeling and Simulation › Fractional Differential Equations Solutions
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › stochastic dynamics and bifurcation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
dendritic spines, diffusion, narrow escape problem, mean residence time, Brownian particles, spine geometry, synaptic transmission, ion channels, neck length, curvature, dendritic shafts

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