Posted by btel - Last updated: 2004-07-06
Title |
Article.2004.07.06.37
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Short Description |
Frequency dependent corticofugal excitation of principal cells in the cat's dorsal lateral geniculate nucleus.
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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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