BAARS, Bernard, Global Network Models, April 24, 2014

BAARS, Bernard,  Global Network Models, April 24, 2014

opens with Plato's cave;

selective attention lights up the conscious bright spot;

michael posner lab:

the  proper control technique for consciousness is non-consciousness;

Steven Lauryes group;

PubMed:  bernie uses it everyday;

20K  articles that claim to have a bearing on consciousness;  stunning richness of literature;

there are 25 major features of consc:   cortical eeg, for example.

theater metaphor has become the global workspace;

internal body feelings to insular cortex (where they are broadcast)

every region of cortex has a correspondng region of thalamus;

depends on constant resonance with thalamus

unitary oscillatory machine  (Steriade in 2006:  Bernie is a fan of Merc. Steriade)

cortex under the influence of thalamic rhythms during sleep;

200M  fibers in corpus callosum  (I recall);

shows CocoMac  circular diagram of connectivity;  extraordinary connectivity of this system;

Bernie:  Cortico-thalamic system: the seat of consc content"

turn on LEDs at time zero  in L side of L visual field  and L side of  R visual field:  both go to  R cortex;

stims  R hemisphere:  and then get

widspread burst of gamma synchrony with other cortical regions,  from  occipo cortex  at time t = 300 msec.

Steve Grossberg:  Adaptive resonance  (and gerald edelman calls it recurrent activity)

watch the gamma bounce around;

Anti Revonsuo:   VAN visual awareness negativity;

around 300 msec after an arbitr input get  markers of consc.

Crone  2006:  ECoG  task is hearing a word;

get  Event related  gamma synchrony:  in auditory area;

and then when repeating word:  gamma in  broca's area;

we can report the contents of consc:

animals:  can do match to sample:

that means that there is something from visual areas that must be communicated in detail to speech areas to report it.

long distance gamma phase locking is present in cortex during waking;

Learning to ride a bike:

as you become practiced, you lose  awareness of it;

same as with  auditory detection task:

he shows  PET for  novel sound detection task when it is consc and voluntary  (lots of areas);

versus  after learning when it is unconsc and automatic  (and then you only see auditory cortex lighting up)

(prob. also true that  basal ganglia takes over the task but not seen )

clicks in two ears:  if  within 100 msec then they fuse  = 10 hz;

Bernie reviewed  GWS  evidence;

aud comment:   (do not see phase locked gamma in REM:

  commenter claims the reason for that is that INTENTION and

guidance of motion/content is not present in REM sleep);

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