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2004-07-06
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Article Posted by btel - Last updated: 2004-07-06
Title
Article.2004.07.06.37
File ExpBrainRes-79-313.pdf
Short Description
Frequency dependent corticofugal excitation of principal cells in the cat's dorsal lateral geniculate nucleus.
Description Excitatory postsynaptic potentials (EPSPs) were evoked in principal cells of the cat's dorsal lateral geniculate nucleus by electrical stimulation of cortico-geniculate fibres. The EPSPs had a pronounced frequency sensitivity. They were barely detectable at stimulation frequencies below 3 Hz but increased dramatically in size at higher frequencies. At 30-50 Hz their amplitude typically exceeded that of EPSPs from optic tract fibres. A prominent EPSP potentiation was also obtained with pair pulse stimulation. The findings are discussed in relation to the hypothesis that the cortico-geniculate system serves as a variable gain regulator for the visual input to the cortex.
Bibliographic Information Exp. Brain Res. 79: 313-318
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Original Release Date
2004/04/19 20:26:00 GMT+2
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