The weird phenomenon of blindsight—in which people take in visual information about objects without actually "seeing" them—has long intrigued scientists, and with good reason. They've watched people navigate obstacle courses and identify colors while being technically blind. This week, in a study in Nature, neuroscientists point to a part of the brain called the lateral geniculate nucleus (LGN) as the neural key that might make blindsight possible.
They used macaques in which the primary visual cortex had been destroyed. The monkeys' eye-focusing movements revealed that they were "seeing" images shown at the periphery of their visual field, but only if their LGN was intact [New Scientist].
The authors refer to the LGN as the "main relay" between the retina and main visual cortex.
Other work had shown that the LGN also has projections to a number of secondary visual areas, suggesting that it may serve as a major hub in ...
