GONZALEZ, Alexander, Parietal Cortex Memory Encoding, Wagner Lab, Jan 11, 2016
<p class="MsoNormal" >GONZALEZ, Alexander, Parietal Cortex Memory Encoding, Wagner Lab, Jan 11, 2016
This is a talk at the MBC grad training program on Monday at Stfd.
He is a grad student in Anthony Wagner's Lab.</p>
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.he shows kid with light saber (why so memorable? eg)</p>
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episodic memory..</p>
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PFC exerts exec control that selects info in WM that comprises episodic memory.</p>
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how abt parietal cortex...</p>
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he shows Lateral parietal cortex...</p>
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shows buckner, krienen 2013 slide... networks that involve par. lobe.</p>
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outline for today</p>
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encoding activity in parietal cortex and encoding behavior</p>
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and 2) encoding activity and retrieval behavior...</p>
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shows raw LFP over 2000 msec in HC.</p>
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if get big negative fluctuation then get good encoding.</p>
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see lower freq deactivated and higher freq activated during encoding...</p>
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so, PPC activity during encoding...</p>
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model is that</p>
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greater DORSAL PPC activity is corr with subseq memory success</p>
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cuz that is correl with <b>top down goal directed attention</b> during the encoding...</p>
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in contrast ventral PCC... activ is negat. correl with memory retr success.</p>
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shows trode coverage (in ECoG pts)</p>
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task....</p>
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see words... did you see it or not? measured by RT if successful.</p>
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x axis is time over abt 1.5 seconds
and y axis is freq power...</p>
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blue means decr in that freq band...</p>
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he compares SPL super parietal lobe vs IPS = intraparietal sulcus...</p>
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these areas are quite active during encoding...</p>
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higher activity in HGP high gamma band leads to faster RTs.</p>
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faster RTs => more confidence in memory.</p>
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then used elasstic-net regression penalization on all freq bands...</p>
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summary</p>
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dorsal PPC activity predicts semantic decision RT...</p>
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