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@ARTICLE{Feldmeyer:4373,
author = {Feldmeyer, D. and Radnikow, G.},
title = {{D}evelopmental alterations in the functional properties of
excitatory neocortical synapses},
journal = {The journal of physiology},
volume = {587},
issn = {0022-3751},
address = {[S.l.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-4373},
pages = {1889 - 1896},
year = {2009},
note = {This work was supported in part by the Helmholtz Society
and a grant from the Deutsche Forschungsgemeinschaft
(FE471/2-1) to D.F.},
abstract = {In the neocortex, most excitatory, glutamatergic synapses
are established during the first 4-5 weeks after birth.
During this period profound changes in the properties of
synaptic transmission occur. Excitatory postsynaptic
potentials (EPSPs) at immature synaptic connections are
profoundly and progressively reduced in response to moderate
to high frequency (5-100 Hz) stimulation. With maturation,
this frequency-dependent depression becomes progressively
weaker and may eventually transform into a weak to moderate
EPSP facilitation. In parallel to changes in the short-term
plasticity, a reduction in the synaptic reliability occurs
at most glutamatergic neocortical synapses: immature
synapses show a high probability of neurotransmitter release
as indicated by their low failure rate and small EPSP
amplitude variation. This high reliability is reduced in
mature synapses, which show considerably higher failure
rates and more variable EPSP amplitudes. During early
neocortical development synaptic vesicle pools are not yet
fully differentiated and their replenishment may be slow,
thus resulting in EPSP amplitude depression. The decrease in
the probability of neurotransmitter release may be the
result of an altered Ca(2+) control in the presynaptic
terminal with a reduced Ca(2+) influx and/or a higher Ca(2+)
buffering capacity. This may lead to a lower synaptic
reliability and a weaker short-term synaptic depression with
maturation.},
keywords = {Adaptation, Physiological: physiology / Animals /
Excitatory Postsynaptic Potentials: physiology / Humans /
Models, Neurological / Neocortex: embryology / Neocortex:
physiology / Nerve Net: physiology / Synapses: physiology /
Synaptic Transmission: physiology / J (WoSType)},
cin = {INM-2 / JARA-BRAIN},
ddc = {610},
cid = {I:(DE-Juel1)INM-2-20090406 / $I:(DE-82)080010_20140620$},
pnm = {Funktion und Dysfunktion des Nervensystems},
pid = {G:(DE-Juel1)FUEK409},
shelfmark = {Neurosciences / Physiology},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:19273572},
pmc = {pmc:PMC2689330},
UT = {WOS:000265617000008},
doi = {10.1113/jphysiol.2009.169458},
url = {https://juser.fz-juelich.de/record/4373},
}