Category specific neural reactivation during working memory mantainance period
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1
Institute of Cognitive Neuroscience, University College of London, United Kingdom
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2
Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College of London, United Kingdom
Working memory allows online mantainance of specific information. Thus far, investigations of the neural mechanism of working memory maintenance have been limited by the inability to track the representation of specific information during the delay. To achieve this, we used Pattern Classification (PC) algorithms, similar to those developped for fMRI data (Haxby et al., 2006; Polyn et al., 2005) on time-frequency MEG data. We were able to track sensor/frequency patterns representating the category of information (indoor vs outdoor scenes) during maintenance over a 5 sec retention period. Initial findings suggest that information representation across the delay is period and phase-coupled to a temporo-occipital theta-rhythm.
References
1. Haxby J, Gobbini MI, Furey ML, Ishai A, Schouten JL, Pietrini P (2001). Distributed and overlapping representations of faces and objects in ventral temporal cortex. Science 293, 2425-30
2. Polyn SM, Natu VS, Cohen JD, Norman KA (2006). Category-specific cortical activity precedes retrieval during memory search. Science 310, 1963-66
Conference:
10th International Conference on Cognitive Neuroscience, Bodrum, Türkiye, 1 Sep - 5 Sep, 2008.
Presentation Type:
Poster Presentation
Topic:
Memory & Learning
Citation:
Fuentemilla
L,
Penny
DW,
Cashdollar
N,
Bunzeck
N and
Düzel
E
(2008). Category specific neural reactivation during working memory mantainance period.
Conference Abstract:
10th International Conference on Cognitive Neuroscience.
doi: 10.3389/conf.neuro.09.2009.01.274
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Received:
09 Dec 2008;
Published Online:
09 Dec 2008.
*
Correspondence:
Lluis Fuentemilla, Institute of Cognitive Neuroscience, University College of London, London, United Kingdom, l.fuentemilla@ucl.ac.uk