Det ligner lidt det at læse noderne til en melodi uden at spille stykket på et instrument.
Men man også kan "vende blikket indad" og i bevidstheden genkalde sig oplevelser/erindringer/minder som man tidligere har perciperet, dvs. oplevelser som spejlneuronerne har simuleret på det tidspunkt man havde oplevelsen.
Erin Wamsley and Robert Stickgold, two of the best scientists doing dream research these days, have presented a new model of the dreaming brain in Wamsley, E. J., and R. Stickgold. 2010. Dreaming and offline memory processing. Current Biology 20 (23):R1010-3. In that article they suggest that some aspects of dreaming cognition, most especially those aspects that promote memory processing, could be mediated by what has become known in neuroscience circles as ‘the default network' of the brain. This is the set of neural structures that are normally activated when we are just resting, doing nothing in particular but daydreaming. I know also that another premier dream researcher Bill Domhoff has suggested something similar in an in-press article Consciousness and Cognition.
Daydreams are an inner world where we can rehearse the future and imagine new adventures without risk. Allowing the mind to roam freely can aid creativity—but only if we pay attention to the content of our daydreams. Neuroscientists have identified the “default network”—a web of brain regions that become active when we mentally drift away from the task at hand into our own reveries. When daydreaming turns addictive and compulsive, it can overwhelm normal functioning, impeding relationships and work. (...)Most people pend about 30 percent of their waking hours spacing out, drifting off, lost in thought, woolgathering -or as one scientist put it, "watching your own mental videos"
Det passer jo meget godt sammen med andre teorier om at der er en sammenhæng mellem det kunstneriske sind og skizofreni.When properly connected, the default network has an automatic shut-down mechanism that kicks in when it is necessary for us to direct our attention outward. For instance, when people with a "properly wired" default network are concentrating on a task, blood flow leaves the default network and areas of the prefrontal cortex that are needed to focus become more active. After all, it is mighty difficult to concentrate on things going on outside when there is so much going on inside.So what does the schizophrenic brain look like? As it turns out, people with schizophrenia have an overactive default network without the important connections that allow them to shut off the network. This overactivity in the default network is present when people with schizophrenia are just chilling as well as when they are trying to focus on an external task.