EEG Models: Chaotic and Linear: PSYCOLOQUY Call for Commentary

[Stevan Harnad]

Note: This is a PSYCOLOQUY Call for Commentators, *not* a BBS Call:

You are invited to submit a formal commentary on the target article
whose abstract appears below. It has just been published in the refereed
electronic journal PSYCOLOQUY. Instructions for retrieving the full
article and for preparing a PSYCOLOQUY commentary appear after the
abstract. All commentaries are refereed.

  TARGET ARTICLE AUTHOR'S RATIONALE FOR SOLICITING COMMENTARY

  The target article attempts to reconcile attractor neural network (ANN)
  theory with certain current models for the generation of the EEG as a
  step toward integrating ANN theory with gross observations of brain
  function. Emphasis is placed on symmetry of cortical connections at a
  macroscopic level as compared to symmetry at a microscopic level. We
  hope to elicit commentary on (1) the methodology of the experiments and
  simulations on which the work is based, (2) any contradictory
  experimental findings, (3) quantitative methods in anatomy required for
  further development, (4) other critiques of ANN applicability to global
  brain function.

psycoloquy.93.4.60.EEG-chaos.1.wright          Thursday 23 December 1993
ISSN 1055-0143   (53 parags, 12 equations, 3 figs, 62 refs, 1092 lines)
PSYCOLOQUY is sponsored by the American Psychological Association (APA)
                Copyright 1993 JJ Wright, RR Kydd & DTJ Liley

                EEG MODELS: CHAOTIC AND LINEAR

                J.J. Wright, R.R. Kydd, D.T.J. Liley
                Department of Psychiatry and Behavioural Science,
                School of Medicine, University of Auckland,
                Auckland, New Zealand
                jwright at ccu1.auckland.ac.nz
		jjw at brain.physics.swin.oz.au

    ABSTRACT: Two complementary EEG models are considered. The first
    (Freeman 1991) predicts 40+ Hz oscillation and chaotic local
    dynamics. The second (Wright 1990) predicts propagating EEG waves
    exhibiting linear superposition, nondispersive transmission, and
    near-equilibrium dynamics, on the millimetric scale. Anatomical
    considerations indicate that these models must apply, respectively,
    to cortical neurons which are very asymmetrically coupled and to
    symmetric average couplings. Aspects of both are reconciled in a
    simulation which explains wave velocities, EEG harmonics, the 1/f
    spectrum of desynchronised EEG, and frequency-wavenumber spectra.
    Local dynamics can be compared to the attractor model of Amit and
    Tsodyks (1990) applied in conditions of highly asymmetric coupling.
    Nonspecific cortical afferents may confer an adiabatic energy
    landscape to the large-scale dynamics of cortex.

    KEYWORDS: chaos, EEG simulation, electroencephalogram, linear
    dynamics, neocortex, network symmetry, neurodynamics, pyramidal
    cell, wave velocity.

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           INSTRUCTIONS FOR PSYCOLOQUY COMMENTATORS

Accepted PSYCOLOQUY target articles have been judged by 5-8 referees to
be appropriate for Open Peer Commentary, the special service provided
by PSYCOLOQUY to investigators in psychology, neuroscience, behavioral
biology, cognitive sciences and philosophy who wish to solicit multiple
responses from an international group of fellow specialists within and
across these disciplines to a particularly significant and
controversial piece of work.

If you feel that you can contribute substantive criticism,
interpretation, elaboration or pertinent complementary or supplementary
material on a PSYCOLOQUY target article, you are invited to submit a
formal electronic commentary. Please note that although commentaries
are solicited and most will appear, acceptance cannot, of course, be
guaranteed.

1.  Before preparing your commentary, please read carefully 
    the Instructions for Authors and Commentators and examine
    recent numbers of PSYCOLOQUY.

2.  Commentaries should be limited to 200 lines (1800 words, references
    included). PSYCOLOQUY reserves the right to edit commentaries for
    relevance and style. In the interest of speed, commentators will
    only be sent the edited draft for review when there have been major
    editorial changes. Where judged necessary by the Editor,
    commentaries will be formally refereed.

3.  Please provide a title for your commentary.  As many 
    commentators will address the same general topic, your
    title should be a distinctive one that reflects the gist
    of your specific contribution and is suitable for the
    kind of keyword indexing used in modern bibliographic 
    retrieval systems. Each commentary should have a brief
    (~50-60 word) abstract

4.  All paragraphs should be numbered consecutively. Line length
    should not exceed 72 characters.  The commentary should begin with
    the title, your name and full institutional address (including zip
    code) and email address.  References must be prepared in accordance
    with the examples given in the Instructions.  Please read the
    sections of the Instruction for Authors concerning style,
    preparation and editing.

PSYCOLOQUY is a refereed electronic journal (ISSN 1055-0143) sponsored
on an experimental basis by the American Psychological Association
and currently estimated to reach a readership of 36,000. PSYCOLOQUY
publishes brief reports of new ideas and findings on which the author
wishes to solicit rapid peer feedback, international and
interdisciplinary ("Scholarly Skywriting"), in all areas of psychology
and its related fields (biobehavioral, cognitive, neural, social, etc.)
All contributions are refereed by members of PSYCOLOQUY's Editorial Board.

Target article length should normally not exceed 500 lines [c. 4500 words].
Commentaries and responses should not exceed 200 lines [c. 1800 words].

All target articles, commentaries and responses must have (1) a short
abstract (up to 100 words for target articles, shorter for commentaries
and responses), (2) an indexable title, (3) the authors' full name(s)
and institutional address(es).

In addition, for target articles only: (4) 6-8 indexable keywords,
(5) a separate statement of the authors' rationale for soliciting
commentary (e.g., why would commentary be useful and of interest to the
field? what kind of commentary do you expect to elicit?) and
(6) a list of potential commentators (with their email addresses).

All paragraphs should be numbered in articles, commentaries and
responses (see format of already published articles in the PSYCOLOQUY
archive; line length should be < 80 characters, no hyphenation).

It is strongly recommended that all figures be designed so as to be
screen-readable ascii. If this is not possible, the provisional
solution is the less desirable hybrid one of submitting them as
postscript files (or in some other universally available format) to be
printed out locally by readers to supplement the screen-readable text
of the article.

PSYCOLOQUY also publishes multiple reviews of books in any of the above
fields; these should normally be the same length as commentaries, but
longer reviews will be considered as well. Book authors should submit a
500-line self-contained Precis of their book, in the format of a target
article; if accepted, this will be published in PSYCOLOQUY together
with a formal Call for Reviews (of the book, not the Precis). The
author's publisher must agree in advance to furnish review copies to the
reviewers selected.

Authors of accepted manuscripts assign to PSYCOLOQUY the right to
publish and distribute their text electronically and to archive and
make it permanently retrievable electronically, but they retain the
copyright, and after it has appeared in PSYCOLOQUY authors may
republish their text in any way they wish -- electronic or print -- as
long as they clearly acknowledge PSYCOLOQUY as its original locus of
publication. However, except in very special cases, agreed upon in
advance, contributions that have already been published or are being
considered for publication elsewhere are not eligible to be considered
for publication in PSYCOLOQUY,

Please submit all material to psyc at pucc.bitnet or psyc at pucc.princeton.edu
Anonymous ftp archive is DIRECTORY pub/harnad/Psycoloquy HOST princeton.edu

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