Turns Out You Really Do Think Brilliant Thoughts in the Shower

Scientific American says: 

Because such processing occurs largely outside a person’s awareness, it is all or nothing—a fully formed answer either comes to mind or it doesn’t. This hypothesis is supported by EEG and functional MRI scans, which revealed in previous studies that just before insight takes place, the occipital cortex, which is responsible for visual processing, momentarily shuts down, or “blinks,” so that ideas can “bubble into consciousness”. As a result, insights are less likely to be incorrect. Analytical thinking, in contrast, happens consciously and is therefore more subject to rushing and lapses in reasoning.

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