Visual Areas
The Lateral geniculate and pulvinar nuclei project to and terminate in V1, and carry motor information from the brain stem as well as other sensory input from the optic tract. The visual cortex connects with other sensory areas which allows for the integration of cognitive tasks such as selective and directed attention, and pre-motor planning, in relation to the processing of incoming visual stimuli. Models of the pulvinar projections to the visual cortex have been proposed by several imaging studies, though the mapping of pulvinar projections has been a difficult task due to the fact that pulvinar subdivisions are not conventionally organized and have been difficult to visualize using structural MRI. Evidence from several studies supports the idea that the Pulvinar nuclei and superior colliculus receive descending projections from CT fibers while TC fibers extending from the LGN carry visual information to the various areas of the visual cortex near the calcarine fissure.
Read more about this topic: Thalamocortical Radiations
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