Two populations of corticothalamic and interareal corticocortical cells in the subgranular layers of the mouse primary sensory cortices |
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Authors: | Petrof Iraklis Viaene Angela N Sherman S Murray |
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Institution: | Department of Neurobiology, University of Chicago, Abbott J-117, Chicago, Illinois 60637, USA. ipetrof@bsd.uchicago.edu |
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Abstract: | The subgranular layers (layers 5 and 6) of primary sensory cortex provide corticofugal output to thalamus and they also project to the appropriate secondary sensory cortices. Here we injected two combinations of different color retrograde fluorescent markers in the thalamic and cortical targets of these layers from the three primary sensory cortices (somatosensory, auditory, and visual) in mice to examine the degree of overlap between corticothalamic and interareal corticocortical cells in the subgranular layers. We found that, for all three primary sensory cortices, double-labeled cells were extremely rare, indicating that corticothalamic and interareal corticocortical cells in the subgranular layers represent largely independent populations. |
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Keywords: | corticothalamic corticocortical fluorescence retrograde labeling corticofugal |
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