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Intracortical synaptic potential modulation by presynaptic somatic potential (Shu et al. 2006, 2007)
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Accession:
135787
" ... Here we show that the voltage fluctuations associated with dendrosomatic synaptic activity propagate significant distances along the axon, and that modest changes in the somatic membrane potential of the presynaptic neuron modulate the amplitude and duration of axonal action potentials and, through a Ca21- dependent mechanism, the average amplitude of the postsynaptic potential evoked by these spikes. These results indicate that synaptic activity in the dendrite and soma controls not only the pattern of action potentials generated, but also the amplitude of the synaptic potentials that these action potentials initiate in local cortical circuits, resulting in synaptic transmission that is a mixture of triggered and graded (analogue) signals."
Reference:
1 .
Shu Y, Duque A, Yu Y, Haider B, McCormick DA (2007) Properties of action-potential initiation in neocortical pyramidal cells: evidence from whole cell axon recordings.
J Neurophysiol
97
:746-60
[
PubMed
]
2 .
Shu Y, Hasenstaub A, Duque A, Yu Y, McCormick DA (2006) Modulation of intracortical synaptic potentials by presynaptic somatic membrane potential.
Nature
441
:761-5
[
PubMed
]
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Model Information
(Click on a link to find other models with that property)
Model Type:
Neuron or other electrically excitable cell;
Axon;
Brain Region(s)/Organism:
Cell Type(s):
Neocortex L5/6 pyramidal GLU cell;
Channel(s):
I Na,t;
I L high threshold;
I A;
I K;
I M;
I h;
I K,Ca;
I_AHP;
I_KD;
Gap Junctions:
Receptor(s):
GabaA;
AMPA;
NMDA;
Gene(s):
Transmitter(s):
Simulation Environment:
NEURON;
Model Concept(s):
Action Potential Initiation;
Detailed Neuronal Models;
Action Potentials;
Synaptic Integration;
Implementer(s):
Search NeuronDB
for information about:
Neocortex L5/6 pyramidal GLU cell
;
GabaA
;
AMPA
;
NMDA
;
I Na,t
;
I L high threshold
;
I A
;
I K
;
I M
;
I h
;
I K,Ca
;
I_AHP
;
I_KD
;
/
ShuEtAl20062007
readme.txt
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2006_Nature.pdf
2006_Nature_supp.pdf
best_full_axon_decay.hoc
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decay_constant.gif
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for_initiation.m
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spike_initiation.gif
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axon potential decay
spike initialization
