To sleep: perchance to learn

The dreaming brain can produce complex language output.

To sleep: perchance to learn
Robert Stickgold
Nature Neuroscience  (September 2012) 15, 1322–1323
http://www.nature.com/neuro/journal/v15/n10/full/nn.3223.html

Not only can the sleeping brain perceive sensory information, it can learn from this information, leading to changed behaviors the next day: it can come to associate a sound with a pleasant or unpleasant odor and react, both while still asleep and after waking, with a deeper or shallower breath. But classic ‘sleep learning’ remains just a dream.

related:
Sounds during sleep may help you remember
2009
http://www.npr.org/templates/story/story.php?storyId=120573613