Sleep & Associations
topic
Sleep — particularly the REM sleep stage characterized by loosely coupled neural associative networks, reduced inhibitory control from the prefrontal cortex, and the broad connectivity between normally segregated brain regions — is the biological mechanism that most powerfully enhances remote associative connection-making, with research showing that sleep produces measurably greater performance on insight problems and Remote Associates Tests than equivalent periods of waking rest.
Role
Sleep's role in creative connection-making has been validated by multiple research programs — with Ullrich Wagner's landmark study showing that subjects who slept between problem-learning and problem-solving discovered the hidden rule three times more often than subjects who did not sleep, and with Matthew Walker's research documenting that REM sleep specifically (rather than non-REM sleep) is the sleep stage most associated with the increased associative connectivity that produces insight. The creative practitioner who sleeps on a problem is not postponing work but engaging the most powerful associative connection-making system available — the brain's own overnight creative processing.