Regional Dendritic Variation in Neonatal Human Cortex: A Quantitative Golgi Study
Abstract
The present study quantitatively compared the basilar dendritic/spine systems of lamina V pyramidal neurons across four hierarchically arranged regions of neonatal human neocortex. Tissue blocks were removed from four Brodmann’s areas (BAs) in the left hemisphere of four neurologically normal neonates (mean age = 41 ± 40 days): primary (BA4 and BA3-1-2), unimodal (BA18), and supramodal cortices (BA10). Tissue was stained with a modified rapid Golgi technique. Ten cells per region (N = 160) were quantified. Despite the small sample size, significant differences in dendritic/spine extent obtained across cortical regions. Most apparent were substantial differences between BA4 and BA10: total dendritic length was 52% greater in BA4 than BA10, and dendritic spine number was 67% greater in BA4 than BA10. Neonatal patterns were compared to adult patterns, revealing that the relative regional pattern of dendritic complexity in the neonate was roughly the inverse of that established in the adult, with BA10 rather than BA4 being the most complex area in the adult. Overall, regional dendritic patterns suggest that the developmental time course of basilar dendritic systems is heterochronous and is more protracted for supramodal BA10 than for primary or unimodal regions (BA4, BA3-1-2, BA18).
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The primary somatosensory cortex and primary motor cortex mature earlier, but the dendritic trees and density of spines within the subdomains of the PFC seem to be more complex.
“The primary somatosensory cortex, as well as the primary motor cortex, mature earlier, however the dendritic trees and the density of spines within the subdomains of the PFC seem to be more complex [246–249].”
From Development of prefrontal cortex (2022) · cites this paper as [247]
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- Authors
- Travis, K., Ford, K., & Jacobs, B.
- Affiliations
- Colorado College (US)
- ORCID
- Jacobs, Bob
- Venue
- Developmental Neuroscience
- Publisher
- S. Karger AG
- Published
- 2005
- Volume
- 27
- Issue
- 5
- Pages
- 277-287
- ISSN
- 0378-5866 (ISSN-L)
- 1421-9859
- OpenAlex
- W2017773492
- Cited by
- 89
- References
- 76
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2023: 6 · 2022: 4 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 6 · 2017: 7 · 2016: 2 · 2015: 6 · 2014: 8 · 2013: 9 · 2012: 7
- FWCI
- 0.84
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Developmental Neuroscience (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Colorado College
- Division of Undergraduate Education
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
- Keywords
- dendritic complexity, dendritic spines, Brodmann area 4, Brodmann area 10, primary motor cortex, heterochrony, cortical development, dendritic length
- MeSH terms
- Adult, Dendrites, Female, Humans, Infant, Infant, Newborn, Male, Pyramidal Cells, Neocortex
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