NDLI: The required measures of phase segregation in distributed cortical processing

Content Provider	IEEE Xplore Digital Library
Author	Gunay, C. Maida, A.S.
Copyright Year	2001
Description	Author affiliation: Center for Adv. Comput. Studies, Univ. of Louisiana at Lafayette, Lafayette, LA, USA (Gunay, C.)
Abstract	Many neuroscience studies suggest that synchronous and oscillatory activity plays an important role in coordinating computations among cortical areas. Elsewhere, the temporal correlation hypothesis has been put forth which relies on synchrony. Activity in distributed cortical areas represents features of an object if it appears synchronously and features of different objects are distinguished if they are desynchronized with others, overcoming the binding problem. The segregation of neural activity into distinct phase windows helps preserve coherence as it propagates to deeper layers of the cortex. Here, the timing is crucial if synchronized spike volleys must meet after crossing different cortical paths, which impose different transmission delays. We propose that a phase segregation mechanism is needed to desynchronize neural responses at their origin for representing multiple objects. In particular, the inhibitory inter-neurons that are found in the cortex give the desired behavior as demonstrated in other studies. The purpose of the present research is to analyze required measures of phase segregation for ensuring coherence in topologies that contain direct and indirect pathways from a source to a destination area. Our results are compatible with psychological studies. We employ the spike response model on top of a localist, connectionist architecture designed for representing symbolic and relational information for verifying our results.
Sponsorship	Int. Neural Network Soc.
Starting Page	290
Ending Page	295
File Size	598644
Page Count	6
File Format	PDF
ISBN	0780370449
ISSN	10987576
DOI	10.1109/IJCNN.2001.939034
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase measurement Topology Neurons Timing Psychology Propagation delay Distributed computing Neuroscience Area measurement Coherence
Content Type	Text
Resource Type	Article

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