🔄FROM THE ARCHIVE: Do dreams exist to protect the brain's visual cortex?
Sign up for our email newsletter for the latest science newsWhy do we dream? Psychologists and neuroscientists have been debating the function of dreams for centuries, but there is still no accepted answer.
We know that the visual cortex, in the brain's occipital lobe, can start to respond to non-visual signals if it is deprived of visual input. In blind people, for instance,. This rewiring or repurposing of under-utilized brain areas is a form of neuroplasticity. associated with stimulation of the occipital cortex during a sleep stage called REM sleep. So it's true that dreams stimulate the visual system. But I'm not convinced that this is the main purpose of dreams.
"The present hypothesis could be tested more thoroughly with direct measures of cortical plasticity."
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