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Electrical Compartmentalization in Dendritic Spines
Abstract
Most excitatory inputs in the CNS contact dendritic spines, avoiding dendritic shafts, so spines must play a key role for neurons. Recent data suggest that, in addition to enhancing connectivity and isolating synaptic biochemistry, spines can behave as electrical compartments independent from their parent dendrites. It is becoming clear that, although spines experience voltages similar to those of dendrites during action potentials (APs), spines must sustain higher depolarizations than do dendritic shafts during excitatory postsynaptic potentials (EPSPs). Synaptic potentials are likely amplified at the spine head and then reduced as they invade the dendrite through the spine neck. These electrical changes, probably due to a combination of passive and active mechanisms, may prevent the saturation of dendrites by the joint activation of many inputs, influence dendritic integration, and contribute to rapid synaptic plasticity. The electrical properties of spines could enable neural circuits to harness a high connectivity, implementing a "synaptic democracy," where each input can be individually integrated, tallied, and modified in order to generate emergent functional states.
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“In addition to inducing compartmentalization of biochemical signals and receptors, it has been suggested that dendritic spines may also serve as electrical compartments (Segev and Rall, 1998; Yuste, 2013).”
From Barriers in the brain: resolving dendritic spine morphology and compartmentalization (2014) · cites this paper as Yuste, 2013
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“Interestingly, a fraction of spines strongly deviated from the average trends that were observed (Takasaki and Sabatini, 2014), suggesting that small local constrictions, local protein accumulations and organelle positioning in the neck may create additional diffusion barriers (Arellano et al., 2007; Yuste, 2013).”
From Barriers in the brain: resolving dendritic spine morphology and compartmentalization (2014) · cites this paper as Yuste, 2013
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Metadata
- Authors
- Yuste, R.
- Affiliations
- Howard Hughes Medical Institute (US)
- Corresponding author
- Yuste, Rafael
- ORCID
- Yuste, Rafael
- Venue
- Annual Review of Neuroscience
- Publisher
- Annual Reviews
- Published
- 2013-07-08
- Volume
- 36
- Issue
- 1
- Pages
- 429-449
- ISSN
- 0147-006X (ISSN-L)
- 1545-4126
- OpenAlex
- W2149246533
- Cited by
- 180
- References
- 128
- Citations by year
- 2026: 10 · 2025: 5 · 2024: 9 · 2023: 15 · 2022: 13 · 2021: 16 · 2020: 13 · 2019: 22 · 2018: 9 · 2017: 16 · 2016: 13 · 2015: 22 · 2014: 16 · 2013: 1
- FWCI
- 1.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Annual Review of Neuroscience (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Mental Health (R01MH101218)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Memory and Neural Computing
- Keywords
- dendritic spines, dendritic integration, excitatory postsynaptic potentials, action potential, synaptic potentials, synaptic plasticity, dendritic excitability
- MeSH terms
- Action Potentials, Animals, Central Nervous System, Dendrites, Humans, Models, Neurological, Neurons, Dendritic Spines, Synaptic Potentials
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