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What Does Immersing Yourself in a Book Do To Your Brain? | Literary Hub
God this is good. So much to read, so much to learn, so much to know about ourselves and the Other.
books  reading  neuroscience  empathy  understanding  feelings  emotions 
2 days ago by alexpriest
The brain’s default mode network – what does it mean to us? Mar 2015
Marcus Raichle interviewed by Svend Davanger

"The default mode network is comprised of several areas of the cortex that are most active when no external tasks demand our attention"

"It was really surprising that, after the demanding tasks were completed, activity in these areas of the cortex increased again. The brain seemed to revert back to a default activity level, which is there in the absence of a specific, ongoing, external task"

"Many of the functions of the network are associated with our perception of our selves."

"It’s not only important to remember what’s important, but also to put a value on what’s important. The part of the default mode network up front, down almost between your eyes, just above your nose, has to do with deciding whether something is good, bad, or indifferent."

"Dreaming is mind-wandering disconnected. Why do we dream? Although there is no clear scientific answer, we cannot claim that dreams are just an inconvenience."

“To summarize the function of the three networks: the attention network makes it possible for us to relate directly to the world around us, i.e., here and now, and the default mode network makes it possible to relate to ourselves and our memories and previous experiences, i.e., the past and future. The salience network makes us switch between the two others according to our needs.”
neuroscience  default-mode-network  meditation  interview  dreams 
5 days ago by pierredv
Dreaming and the Default Mode Network: Some Psychoanalytic Notes: Contemporary Psychoanalysis: Vol 49, No 2

This article makes a brief contribution to the ongoing dialogue on dreams between neuroscience and psychoanalysis by linking several converging lines of evidence. Recent evidence indicates that the default mode network (DMN), a highly interconnected set of “hubs” in the brain, is active during sleep. In addition, activity in the DMN is strongly associated with mental imagery that is not directly tied to current perception (“stimulus-independent thought”), which is also a central feature of dreams. Finally, the elimination of dreams is correlated with lesions in areas that have a high degree of overlap with two regions of the DMN, the ventromedial prefrontal cortex (vmPFC) and the temporo-occipital junction. Given that the vmPFC is a key node in brain circuitry regulating motivation, these converging lines of evidence support the basic psychoanalytic idea that dreams arise from wishful impulses and other emotional motivations.
dreams  psychotherapy  neuroscience 
5 days ago by pierredv
Scientists found brain’s internal clock that influences how we perceive time | Ars Technica
Our time tracking system has to be flexible because (as we noted above) the perception of time depends on context. How your brain records the passage of time when you are engaged in a mundane repetitive task like playing Solitaire will be different from how it does so if you are experiencing Thai food for the first time. The brain handles this by making the system very distributed, with hundreds of cells involved (meaning the researchers had to record lots of them). By contrast, location seems to be handled by a smaller number of specialized cells.

For the second round, researchers set boundaries on Marco's chocolate hunt: instead of roaming freely, he was forced to turn left or right in a maze shaped like a figure eight. The shift in type of activity showed up in the neural activity data. "We saw the time-coding signal change character from unique sequences in time, to a repetitive and partly overlapping pattern," said Tsao. "The time signal became more precise and predictable during the repetitive task." They were seeing the changing shape of time in response to different experiences.
neuroscience  time  perception  brain  chocolate 
14 days ago by craniac

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