---
abstract: |-
A self-organising model is proposed to explain the criticality
in cortical networks deduced from recent observations of neuronal
avalanches. Prevailing understanding of self-organised criticality (SOC)
dictates that conservation of energy is essential to its emergence.
Neuronal networks however are inherently non-conservative as demonstrated
by microelectrode recordings. The model presented here shows that SOC can
arise in non-conservative systems as well, if driven internally. Evidence
suggests that synaptic background activity provides the internal drive for non-conservative
cortical networks to achieve and maintain a critical state. SOC is robust to
any degree $\eta \in (0,1]$ of background activity when the network size $N$
is large enough such that $\eta N\sim 10^3$. For small networks, a strong background
leads to epileptiform activity, consistent with neurophysiological knowledge
about epilepsy.
altloc:
- http://arxiv.org/abs/nlin/0701020
chapter: ~
commentary: ~
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contact_email: ~
creators_id:
- djuanico
creators_name:
- family: Juanico
given: D.E.
honourific: Dr
lineage: ''
date: 2007-01
date_type: published
datestamp: 2007-02-19
department: ~
dir: disk0/00/00/53/98
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editors_id: []
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eprint_status: archive
eprintid: 5398
fileinfo: /style/images/fileicons/application_pdf.png;/5398/1/cogprints%2Djuanico%2D2007.pdf
full_text_status: public
importid: ~
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isbn: ~
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item_issues_comment: []
item_issues_count: 0
item_issues_description: []
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keywords: self-organised criticality; neuronal avalanche; intrinsic plasticity
lastmod: 2011-03-11 08:56:46
latitude: ~
longitude: ~
metadata_visibility: show
note: |
The author wishes to acknowledge the Office of the Vice-Chancellor for Research and
Development (OVCRD) of the University of the Philippines, Diliman for Research Grant
No. 050501 DNSE and the Philippine Council for Advanced Science and
Technology Research and Development (PCASTRD) for funding.
number: ~
pagerange: ~
pubdom: FALSE
publication: ~
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refereed: FALSE
referencetext: ~
relation_type: []
relation_uri: []
reportno: ~
rev_number: 12
series: ~
source: ~
status_changed: 2007-09-12 17:09:31
subjects:
- bio-phys
- neuro-mod
succeeds: ~
suggestions: ~
sword_depositor: ~
sword_slug: ~
thesistype: ~
title: Self-organising mechanism of neuronal avalanche criticality
type: preprint
userid: 6908
volume: ~