Cited by 1,131Neuroscience and Neuropharmacology ResearchNeurogenesis and neuroplasticity mechanismsMemory and Neural Mechanisms

Transient and persistent dendritic spines in the neocortex in vivo

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Holtmaat, Anthony J.G.D., Trachtenberg, Joshua T., Wilbrecht, Linda, Shepherd, Gordon M., Zhang, Xiaoqun, Knott, Graham W., Svoboda, Karel·2005·Neuron

Abstract

Dendritic spines were imaged over days to months in the apical tufts of neocortical pyramidal neurons (layers 5 and 2/3) in vivo. A fraction of thin spines appeared and disappeared over a few days, while most thick spines persisted for months. In the somatosensory cortex, from postnatal day (PND) 16 to PND 25 spine retractions exceeded additions, resulting in a net loss of spines. The fraction of persistent spines (lifetime > or = 8 days) grew gradually during development and into adulthood (PND 16-25, 35%; PND 35-80, 54%; PND 80-120, 66%; PND 175-225, 73%), providing evidence that synaptic circuits continue to stabilize even in the adult brain, long after the closure of known critical periods. In 6-month-old mice, spines turn over more slowly in visual compared to somatosensory cortex, possibly reflecting differences in the capacity for experience-dependent plasticity in these brain regions.

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Crossref · 10.1016/j.neuron.2005.01.003

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  • Holtmaat et al. (2005) showed that the density of spines on layer V pyramidal neurons in somatosensory cortex reached a stable value of 0.32/μm after postnatal day 26.

    “Holtmaat et al. (2005) showed that the density of spines on layer V pyramidal neurons in somatosensory cortex reached a stable value of 0.32/m after postnatal day 26”

    From Dendritic Spine Abnormalities in Amyloid Precursor Protein Transgenic Mice Demonstrated by Gene Transfer and Intravital Multiphoton Microscopy (2005) · cites this paper as Holtmaat et al., 2005

    The passage discussing Figure 1E reports a decline in spine density to 0.30 ± 0.08/μm at postnatal day 26 and a separate fixed-tissue measurement of 0.32 ± 0.02/μm at days 25–33. The passage discussing Figures 2C–2D describes density as constant in mature animals, but gives 0.29 ± 0.08/μm. Thus the paper supports a decline followed by relatively stable density, not a stable value of exactly 0.32/μm after day 26. Page numbers are unavailable in our copy. (LLM, conf=0.87)

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  • Dendritic spines of transplanted human neurons follow a prolonged timeline that resembles the maturation time of human cortical neurons and that is largely intrinsic to these neurons, as they still display juvenile-like dynamic patterns at 3-6 MPT (e.g., in a mature mouse brain environment).

    “These data support the notion that dendritic spines of transplanted human neurons follow a prolonged timeline that resembles the maturation time of human cortical neurons (Petanjek et al., 2011) and that is largely intrinsic to these neurons, as they still display juvenile-like dynamic patterns at 3–6 MPT (e.g., in a mature mouse brain environment)”

    From Xenotransplanted human cortical neurons reveal species-specific development and functional integration into mouse visual circuits (2019) · cites this paper as Holtmaat et al., 2005

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  • Thin spines are more transient and motile than mushroom spines, and an increase in the proportion of thin spines represents a greater capacity to stabilize after LTP.

    “Previous studies have shown that thin spines are more transient and motile than mushroom spines, and an increase in the proportion of thin spines represents a greater capacity to stabilize after LTP [52], [53].”

    From Arf4 Determines Dentate Gyrus-Mediated Pattern Separation by Regulating Dendritic Spine Development (2012) · cites this paper as [52]

    The spine-morphology passages (Figure 7B and 7D; page not supplied) associate thin spines with turnover and changing length, while persistent spines tend to be thicker, including mushroom-shaped spines. The paper only suggests that thin spines might stabilize and enlarge under some conditions; it does not show that a higher proportion of thin spines means greater capacity to stabilize after LTP. (LLM, conf=0.88)

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  • Transient spines are usually thin and live shorter than a few days.

    “Transient spines are usually thin and live shorter than a few days (Holtmaat et al., 2005).”
  • In naive mice, persistent spines are typically large, mushroom-like, and stable for weeks or months.

    “In naive mice, persistent spines are typically large, mushroom-like, and stable for weeks or months.”

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Authors
Holtmaat, A. J. G. D., Trachtenberg, J. T., Wilbrecht, L., Shepherd, G. M., Zhang, X., Knott, G. W., & Svoboda, K.
Affiliations
  • Howard Hughes Medical Institute (US)
  • University of Lausanne (CH)
Corresponding author
Svoboda, Karel
Venue
Neuron
Publisher
Elsevier BV
Published
2005-01
Volume
45
Issue
2
Pages
279-291
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2145255740
Cited by
1,131
References
68
Citations by year
2026: 30 · 2025: 28 · 2024: 34 · 2023: 57 · 2022: 57 · 2021: 61 · 2020: 52 · 2019: 62 · 2018: 50 · 2017: 65 · 2016: 61 · 2015: 54 · 2014: 56 · 2013: 76 · 2012: 55
FWCI
20.85
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
dendritic spines, spine dynamics, neocortex, pyramidal neurons, somatosensory cortex, visual cortex, cortical development, synaptic stability, critical period, experience-dependent plasticity
MeSH terms
Aging, Animals, Animals, Newborn, Cell Differentiation, Male, Mice, Inbred C57BL, Mice, Transgenic, Microscopy, Fluorescence, Neural Pathways, Neuronal Plasticity, Somatosensory Cortex, Synapses, Visual Cortex, Pyramidal Cells, Neocortex, Dendritic Spines, Green Fluorescent Proteins, Mice

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