Source:http://linkedlifedata.com/resource/pubmed/id/12650984
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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1-2
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pubmed:dateCreated |
2003-3-24
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pubmed:abstractText |
Short-term plasticity of On- and Off-EPSPs, and its potential role in regulation of signal processing was studied in salamander retinal On-Off ganglion cells by whole-cell recording. Paired-pulse light stimulation resulted in a depression of On-, and an enhancement of Off-EPSCs. Recovery from depression and enhancement was exponential and complete by 20 s. Paired-pulse enhancement, but not depression, was abolished with increasing stimulus duration. Blockade of On-EPSC by L-2-amino-4-phosphonobutyrate (AP-4), an agonist at group III mGluRs, significantly increased Off-EPSCs evoked by short (<2 s) duration conditioning light stimuli, resulting in a reversal of the paired-pulse enhancement to depression. The acetylcholinesterase inhibitor eserine reduced Off-EPSC1 and increased the ratio of enhancement. An opposite effect was observed in the presence of the nACh receptor antagonist d-tubocurarine. AP-7, an antagonist of NMDA receptors attenuated the enhancement of Off-EPSCs. In current clamp mode paired-pulse stimulation resulted in a modulation of light evoked, as well as the depolarization-induced spike firing pattern of ganglion cells. The present study suggests that paired light stimulation differently modulates On and Off EPSPs, and the light-evoked spike firing pattern of On-Off ganglion cells.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0006-8993
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
28
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pubmed:volume |
967
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
235-46
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:12650984-Action Potentials,
pubmed-meshheading:12650984-Ambystoma,
pubmed-meshheading:12650984-Animals,
pubmed-meshheading:12650984-Excitatory Postsynaptic Potentials,
pubmed-meshheading:12650984-Neuronal Plasticity,
pubmed-meshheading:12650984-Photic Stimulation,
pubmed-meshheading:12650984-Receptors, N-Methyl-D-Aspartate,
pubmed-meshheading:12650984-Retinal Ganglion Cells,
pubmed-meshheading:12650984-Urodela
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pubmed:year |
2003
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pubmed:articleTitle |
Differential modulation of light-evoked on- and off-EPSCs by paired-pulse stimulation in salamander retinal ganglion cells.
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pubmed:affiliation |
Department of Ophthalmology, New York University School of Medicine, NY 10016, USA. aa3@nyu.edu
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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