NDLI: Cortical mechanisms of memory formation and readout

Content Provider	IEEE Xplore Digital Library
Author	Freeman, W.J.
Copyright Year	2009
Description	Author affiliation: Department of Molecular & Cell Biology, Donner 101, University of California at Berkeley 94720-3206, USA (Freeman, W.J.)
Abstract	Most researchers regard the ‘spontaneous’ background activity seen in EEG (scalp electroencephalogram) and ECoG (intracranial electrocorticogram) as noise, to which signals are added by stimuli or by intention to act. Indeed they are noise, but they are not random, and the signals are not added. They emerge by rapid, large-scale reorganization of background activity in the process of perception. Here I show that the background activity of the brain conforms to a modified form of scale-free brown noise - black noise - that is sustained by mutual excitation. Distributed inhibitory feedback operates on the noise as a band pass filter, giving Rayleigh noise in every pass band. The beats trigger the formation of non-random spatiotemporal structures by enabling repetitive phase transitions, through which the microscopic activity patterns of neural populations abruptly re-form upon selection by stimuli into spatial brain wave patterns revealing Rice distributions. The reorganization under sensory guidance constitutes recall of memories stored in synaptic distributions, leading to recognition through transient states of globally patterned brain activity.
Starting Page	882
Ending Page	889
File Size	2043186
Page Count	8
File Format	PDF
ISBN	9781424435487
ISSN	10987576
DOI	10.1109/IJCNN.2009.5178646
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Background noise Electroencephalography Scalp Large-scale systems Neurofeedback Band pass filters Spatiotemporal phenomena Microscopy Pattern recognition Brain
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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