کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4323315 | 1291765 | 2006 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The Parvocellular LGN Provides a Robust Disynaptic Input to the Visual Motion Area MT The Parvocellular LGN Provides a Robust Disynaptic Input to the Visual Motion Area MT](/preview/png/4323315.png)
SummaryDorsal visual cortical areas are thought to be dominated by input from the magnocellular (M) visual pathway, with little or no parvocellular (P) contribution. These relationships are supported by a close correlation between the functional properties of these areas and the M pathway and by a lack of anatomical evidence for P input. Here we use rabies virus as a retrograde transynaptic tracer to show that the dorsal area MT receives strong input, via a single relay, from both M and P cells of the lateral geniculate nucleus. This surprising P input, likely relayed via layer 6 Meynert cells in primary visual cortex, can provide MT with sensitivity to a more complete range of spatial, temporal, and chromatic cues than the M pathway alone. These observations provide definitive evidence for P pathway input to MT and show that convergence of parallel visual pathways occurs in the dorsal stream.
Journal: - Volume 50, Issue 2, 20 April 2006, Pages 319–327