Kolloquium: Memory networks and representations

  • Datum: 06.07.2017
  • Uhrzeit: 13:00
  • Vortragende(r): Roberto Cabeza
  • Ort: Max-Planck-Institut für Bildungsforschung, Lentzeallee 94, 14195 Berlin
  • Raum: Kleiner Sitzungssaal
  • Gastgeber: Forschungsbereich Entwicklungspsychologie
  • Kontakt: seklindenberger@mpib-berlin.mpg.de

This is to inform you that there will be a LIP External Colloquium on Thursday, July 6, at 13:00h in the small conference room.

Roberto Cabeza, Center for Cognitive Neuroscience, Duke University, USA

Memory networks and representations

Episodic memory is assumed to depend on a complex network of brain regions that mediate encoding and retrieval processes and store memory representations. Memory traces are assumed to be distributed over the cortex but integrated by relational representations in hippocampus. Consistent with this hypothesis, graph-based network studies show the hippocampus becomes more integrated with the rest of the network during successful retrieval, which is also associated with reduced network modularity. The episodic network is flexible so that when the function of a region is impaired using TMS, this deficit is compensated by increased connectivity across the network.
To investigate the nature of episodic representations, Cabeza and his team measure similarity in activation patterns during encoding and retrieval. Using this approach, they have identified cortical regions that event-specific representations, and have distinguished between visual and semantic aspects of episodic representations. Taking together, these studies demonstrate the power of network and representational analyses to clarify the neural mechanisms of episodic memory

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