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@ARTICLE{Dufour:280153,
author = {Dufour, A. and Rollenhagen, A. and Sätzler, K. and Lübke,
Joachim},
title = {{D}evelopment of {S}ynaptic {B}outons in {L}ayer 4 of the
{B}arrel {F}ield of the {R}at {S}omatosensory {C}ortex: {A}
{Q}uantitative {A}nalysis},
journal = {Cerebral cortex},
volume = {26},
number = {2},
issn = {1460-2199},
address = {Oxford},
publisher = {Oxford Univ. Press},
reportid = {FZJ-2015-07899},
pages = {838-854},
year = {2016},
abstract = {Understanding the structural and functional mechanisms
underlying the development of individual brain microcircuits
is critical for elucidating their computational properties.
As synapses are the key structures defining a given
microcircuit, it is imperative to investigate their
development and precise structural features. Here, synapses
in cortical layer 4 were analyzed throughout the first
postnatal month using high-end electron microscopy to
generate realistic quantitative 3D models. Besides their
overall geometry, the size of active zones and the pools of
synaptic vesicles were analyzed. At postnatal day 2 only a
few shaft synapses were found, but spine synapses steadily
increased with ongoing corticogenesis. From postnatal day 2
to 30 synaptic boutons significantly decreased in size
whereas that of active zones remained nearly unchanged
despite a reshaping. During the first 2 weeks of postnatal
development, a rearrangement of synaptic vesicles from a
loose distribution toward a densely packed organization
close to the presynaptic density was observed, accompanied
by the formation of, first a putative readily releasable
pool and later a recycling and reserve pool. The
quantitative 3D reconstructions of synapses will enable the
comparison of structural and functional aspects of signal
transduction thus leading to a better understanding of
networks in the developing neocortex.},
cin = {INM-2},
ddc = {610},
cid = {I:(DE-Juel1)INM-2-20090406},
pnm = {571 - Connectivity and Activity (POF3-571)},
pid = {G:(DE-HGF)POF3-571},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000371522500031},
pubmed = {pmid:26574502},
doi = {10.1093/cercor/bhv270},
url = {https://juser.fz-juelich.de/record/280153},
}