Psy 123_Lec 16 Social Cognition

The functionality of the dmn finding the self an

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Unformatted text preview: cortex, but see lack of deactivation in the PCC The Default Mode Network of the Brain! The Functionality of the DMN! Finding the Self? An Event-Related fMRI Study! Kelley et al., (2002), Journal of Cognitive Neuroscience! “polite”! Is the adjective in uppercase letters?! Does the adjective describe George Bush?! Does the adjective describe you?! MPFC (BA 10) 10 52 2! What kind of tasks can you get a person to do, that will increase areas of the DMN? fMRI study by Kelley looking at self-referential processing during a memory task. We've known for a long time that memory is aided by deeper levels-of-processing, or relating to oneself (selfreferential effect). The key finding was when looking at the difference between thinking about yourself vs thinking about someone else, in the mPFC, the bold signal is much higher when thinking about yourself than thinking about others. The mPFC becomes very active when thinking about yourself, so thats one hint at what this is doing. These areas, particularly the mPFC, can also become when you are thinking about the mind of somebody else (putting yourself in their shoes -- theory of mind like task). The Default Mode Network of the Brain! The Functionality of the DMN! Neural correlates of detecting pretense: imaging the intentional stance under covert conditions! T. German, J. Niehaus, M. Roarty, & M. Miller (2005) J. of Cognitive Neuroscience ! real action! ~ 5 seconds! pretend action! ~ 5 seconds! Pretend Actions ! vs. Real Actions ! (covert condition)! z = 33! z = 27! z = -3! z = -15! Watch a video of a woman pulling down a book from a bookshelf was contrasted with videos a women pretending to pull a book down from a bookshelf (theory of mind like task). No inferences you must make when someone is making a real action, however there is when watching someone pretend action. Found that the medial PFC becomes much more active. So found that the mPFC not only is more active when thinking about yourself, but is more active when you are thinking about other people view. The Default Mode Network of the Brain! The Functionality of the DMN! Schacter, Addis, & Buckner (2008) The Year in Cognitive Neuroscience! Remembering the past and imagining the future engage almost identical brain regions.! 30:00 The other thing that seems to get engaged is in episodic memory task. Whenever you retrieve a memory from the past, not only in the MTL is involved, but other areas of the mPFC and PCC get involved as well. What is interesting about this fMRI study is that its not only retrieving things from your personal past, but also imagining your future. Alot of these brain regions overlap each other. The Default Mode Network of the Brain! The Functionality of the DMN! People have a tendency to mind wander when lying there in the scanner. Hot topic in cognitive neuroscience -- what is it that people are actually doing in mind wandering, what brain regions are involved, etc. Study looked at mind-wandering; engaged in a task like reading, and waiting for...
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