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<DIV><FONT face=Arial size=2>Hi Alex,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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</FONT></DIV>
<DIV><FONT face=Arial size=2>their tightest and most dense?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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</FONT></DIV>
<DIV><FONT face=Arial size=2>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</FONT></DIV>
<DIV><FONT face=Arial size=2>no nanobot with a payload worth a damn could get
much smaller than a half a micron I'd guessimate.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Cheers,</FONT></DIV>
<DIV><FONT face=Arial size=2>Brett</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=alex@ramonsky.com href="mailto:alex@ramonsky.com">Alex Ramonsky</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=extropy-chat@lists.extropy.org
href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</A>
; <A title=mind-l@yahoogroups.com
href="mailto:mind-l@yahoogroups.com">mind-l@yahoogroups.com</A> ; <A
title=murg@minduploading.org
href="mailto:murg@minduploading.org">murg@minduploading.org</A> ; <A
title=sag@gnufans.net href="mailto:sag@gnufans.net">sag</A> ; <A
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</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, September 04, 2004 8:26
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [extropy-chat] Neuro links</DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial
size=2></FONT><BR></DIV>Nice neuro links to dive
into:<BR>******************<BR><BR><A class=moz-txt-link-freetext
href="http://brainmuseum.org/index.html">http://brainmuseum.org/index.html</A><BR>(massive
collection of mammalian brains)<BR><BR><A class=moz-txt-link-freetext
href="http://web.sfn.org/content/Publications/BrainBriefings/index.html">http://web.sfn.org/content/Publications/BrainBriefings/index.html</A><BR>(lots
of diverse topics)<BR><BR><A class=moz-txt-link-freetext
href="http://www.neuroguide.com/index.html">http://www.neuroguide.com/index.html</A><BR>(neuroscience
resources. This site can be a bugger to navigate)<BR><BR><A
class=moz-txt-link-freetext
href="http://www.psy.ed.ac.uk/psychexps/Exps/experiments.html">http://www.psy.ed.ac.uk/psychexps/Exps/experiments.html</A><BR>(psychology
experiments)<BR><BR><A class=moz-txt-link-freetext
href="http://psych.hanover.edu/Research/exponnet.html">http://psych.hanover.edu/Research/exponnet.html</A><BR>(psychology
experiments)<BR><BR><A class=moz-txt-link-freetext
href="http://www.beemnet.com/dana/virtuallabs.html">http://www.beemnet.com/dana/virtuallabs.html</A><BR>(more
invasive techniques. If squeamish bring sick bag)<BR><BR><A
class=moz-txt-link-freetext
href="http://www.ucsf.edu/neurosc/faculty/Sretavan/freeze.html">http://www.ucsf.edu/neurosc/faculty/Sretavan/freeze.html</A><BR>(Axon
growth. -Massive file; don't go there without broadband)<BR><BR><A
class=moz-txt-link-freetext
href="http://www.ncbi.nlm.nih.gov/">http://www.ncbi.nlm.nih.gov/</A><BR>(Biotechnology.
The link 'OMIM' takes you to the Online Inheritance in Man site)<BR><BR><A
class=moz-txt-link-freetext
href="http://www.med.uwo.ca/physiology/courses/madsweb/">http://www.med.uwo.ca/physiology/courses/madsweb/</A><BR>(animations
& pdf files about various bits of brain)<BR><BR><A
class=moz-txt-link-freetext
href="http://www.med.uwo.ca/physiology/courses/sensesweb/">http://www.med.uwo.ca/physiology/courses/sensesweb/</A><BR>(animation
of learning & memory.)<BR><BR><A class=moz-txt-link-freetext
href="http://www.uwm.edu/%7Ejohnchay/cc.htm">http://www.uwm.edu/~johnchay/cc.htm</A><BR>(classical
conditioning -you get to play with the variables. Entertaining when
drunk.)<BR><BR>Sites about motivation:<BR><A class=moz-txt-link-freetext
href="http://www.nida.nih.gov/">http://www.nida.nih.gov/</A><BR><BR><A
class=moz-txt-link-freetext
href="http://www.lsa.umich.edu/psych/research&labs/berridge/Research.html">http://www.lsa.umich.edu/psych/research&labs/berridge/Research.html</A><BR><BR>Sites
about emotion:<BR><A class=moz-txt-link-freetext
href="http://mambo.ucsc.edu/psl/fanl.html">http://mambo.ucsc.edu/psl/fanl.html</A><BR><BR><A
class=moz-txt-link-freetext
href="http://www.unige.ch/fapse/emotion/">http://www.unige.ch/fapse/emotion/</A><BR><BR><A
class=moz-txt-link-freetext
href="http://www.mrc-cbu.cam.ac.uk/Common/Research/cognition-emotion/index.shtml">http://www.mrc-cbu.cam.ac.uk/Common/Research/cognition-emotion/index.shtml</A><BR><BR><A
class=moz-txt-link-freetext
href="http://www.news.wisc.edu/packages/emotion/">http://www.news.wisc.edu/packages/emotion/</A><BR><BR><A
class=moz-txt-link-freetext
href="http://emotion.salk.edu/Emotion/EmoRes/Psych/SelTops.html">http://emotion.salk.edu/Emotion/EmoRes/Psych/SelTops.html</A><BR><BR>Sites
about consciousness:<BR><A class=moz-txt-link-freetext
href="http://www.consciousness.arizona.edu/ccsmain/Tucson2002/Tucson2002index.htm">http://www.consciousness.arizona.edu/ccsmain/Tucson2002/Tucson2002index.htm</A><BR><BR><A
class=moz-txt-link-freetext
href="http://www.imprint.co.uk/jcs.html">http://www.imprint.co.uk/jcs.html</A><BR><BR><A
class=moz-txt-link-freetext
href="http://jamaica.u.arizona.edu/%7Echalmers/">http://jamaica.u.arizona.edu/~chalmers/</A><BR><BR>***********************<BR>Enjoy!<BR>AR<BR>
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