Synaptic patterns on different cell types in the different laminae of the cat visual cortex. An electron microscope study

Colonnier, Marc

doi:10.1016/0006-8993(68)90234-5

Cited by 946Neuroscience and Neuropharmacology ResearchVisual perception and processing mechanismsCellular transport and secretion

Synaptic patterns on different cell types in the different laminae of the cat visual cortex. An electron microscope study

Colonnier, Marc·1968·Brain Research

DOI 10.1016/0006-8993(68)90234-5

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In vertebrate EM datasets, human annotators can see differences in the vesicles for excitatory and inhibitory synapses.
“In vertebrate EM datasets, human annotators can see differences in the vesicles for excitatory and inhibitory synapses.16,35,36,37,109,110”
From Neurotransmitter classification from electron microscopy images at synaptic sites in Drosophila melanogaster (2024) · cites this paper as [109]
Asymmetric (AS) synapses have a thick postsynaptic density, while symmetric (SS) synapses have a thin postsynaptic density.
“AS and SS have a thick and thin postsynaptic density, respectively.”
From Unambiguous identification of asymmetric and symmetric synapses using volume electron microscopy (2024) · cites this paper as Colonnier, 1968
In the cerebral cortex, most asymmetric synapses are excitatory (glutamatergic), while symmetric synapses are inhibitory (GABAergic).
“In the cerebral cortex, since most AS are excitatory (glutamatergic), and SS are inhibitory (GABAergic)”
From Unambiguous identification of asymmetric and symmetric synapses using volume electron microscopy (2024) · cites this paper as Colonnier, 1968

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Authors: Colonnier, M.
Affiliations: Université de Montréal (CA)
Corresponding author: Colonnier, Marc
Venue: Brain Research
Publisher: Elsevier BV
Published: 1968-07
Volume: 9
Issue: 2
Pages: 268-287
ISSN: 0006-8993 (ISSN-L)
DOI: 10.1016/0006-8993(68)90234-5
OpenAlex: W2032774015
Cited by: 946
References: 33
Citations by year: 2026: 3 · 2025: 9 · 2024: 10 · 2023: 9 · 2022: 12 · 2021: 9 · 2020: 14 · 2019: 9 · 2018: 7 · 2017: 10 · 2016: 10 · 2015: 5 · 2014: 12 · 2013: 13 · 2012: 11
FWCI: 20.23
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Brain Research (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords: asymmetrical synapses, dendritic spines, pyramidal neurons, stellate cells, cat visual cortex, cortical layers
MeSH terms: Animals, Cats, Cerebral Cortex, Dendrites, Microscopy, Electron, Neurons, Staining and Labeling, Synapses, Vision, Ocular, Visual Cortex

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