[extropy-chat] Neuro links

[Brett Paatsch]

Hi Alex,

Do you know how much space is between axons, dendrites, synapses on neurons in the most densely packed part of the brain? ie how tight do neurons pack at
their tightest and most dense?

Reason I ask is that I think that is an important design scale limit on any servicing/repairing nanobots that might want to get between them. 

In actual fact I suspect that to try and get a nanobot into the extracellular spaces between neurons may be impossible, because the space may be
as little as 10s of nanometres in places (and the space map would be different for every brain - more different than variations in vasculature) and
no nanobot with a payload worth a damn could get much smaller than a half a micron I'd guessimate.

Cheers,
Brett

  ----- Original Message ----- 
  From: Alex Ramonsky 
  To: extropy-chat at lists.extropy.org ; mind-l at yahoogroups.com ; murg at minduploading.org ; sag ; extrobritannia at yahoogroups.com ; fusioncore at yahoogroups.com ; technocalypse at yahoogroups.com 
  Sent: Saturday, September 04, 2004 8:26 PM
  Subject: [extropy-chat] Neuro links


  Nice neuro links to dive into:
  ******************

  http://brainmuseum.org/index.html
  (massive collection of mammalian brains)

  http://web.sfn.org/content/Publications/BrainBriefings/index.html
  (lots of diverse topics)

  http://www.neuroguide.com/index.html
  (neuroscience resources. This site can be a bugger to navigate)

  http://www.psy.ed.ac.uk/psychexps/Exps/experiments.html
  (psychology experiments)

  http://psych.hanover.edu/Research/exponnet.html
  (psychology experiments)

  http://www.beemnet.com/dana/virtuallabs.html
  (more invasive techniques. If squeamish bring sick bag)

  http://www.ucsf.edu/neurosc/faculty/Sretavan/freeze.html
  (Axon growth. -Massive file; don't go there without broadband)

  http://www.ncbi.nlm.nih.gov/
  (Biotechnology. The link 'OMIM' takes you to the Online Inheritance in Man site)

  http://www.med.uwo.ca/physiology/courses/madsweb/
  (animations & pdf files about various bits of brain)

  http://www.med.uwo.ca/physiology/courses/sensesweb/
  (animation of learning & memory.)

  http://www.uwm.edu/~johnchay/cc.htm
  (classical conditioning -you get to play with the variables. Entertaining when drunk.)

  Sites about motivation:
  http://www.nida.nih.gov/

  http://www.lsa.umich.edu/psych/research&labs/berridge/Research.html

  Sites about emotion:
  http://mambo.ucsc.edu/psl/fanl.html

  http://www.unige.ch/fapse/emotion/

  http://www.mrc-cbu.cam.ac.uk/Common/Research/cognition-emotion/index.shtml

  http://www.news.wisc.edu/packages/emotion/

  http://emotion.salk.edu/Emotion/EmoRes/Psych/SelTops.html

  Sites about consciousness:
  http://www.consciousness.arizona.edu/ccsmain/Tucson2002/Tucson2002index.htm

  http://www.imprint.co.uk/jcs.html

  http://jamaica.u.arizona.edu/~chalmers/

  ***********************
  Enjoy!
  AR



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