Dear John, (01)
Did you by any chance attend the "Emotions in
Meaning" seminar in Boston, about 3,000 miles from
me? Did anyone else on the list? (02)
If so, please email any URLs you might have about
that seminar to me or the list as you see fit. (03)
Thanks for the reference to the slides; it's
useful to know how many brain regions are
associated with behavioral properties, especially
linguistic behaviors. (04)
-Rich (05)
Sincerely,
Rich Cooper
EnglishLogicKernel.com
Rich AT EnglishLogicKernel DOT com
9 4 9 \ 5 2 5 - 5 7 1 2 (06)
-----Original Message-----
From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
[mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx] On
Behalf Of John F Sowa
Sent: Wednesday, November 20, 2013 2:55 PM
To: ontolog-forum@xxxxxxxxxxxxxxxx
Subject: Re: [ontolog-forum] Semantic Dementia (07)
On 11/20/2013 2:33 PM, Rich Cooper wrote:
> I find their hub-and-spoke model very
interesting when trying
> to understand how the brain uses language,
sensors and effectors
> in such flexible ways: (08)
I completely agree. But I don't believe that
there is a single hub,
and I don't believe that the authors are claiming
a single hub. (09)
And guess what you get when you have multiple
hubs? A network. (010)
The linguist Sydney Lamb, who had been
collaborating with
neuroscientists since the 1970s, formulated his
theory of
neurocognitive networks. I summarize Lamb's
theory (with
references) in
http://www.jfsowa.com/talks/goal2.pdf (011)
I adapted (with permission) several of Lamb's
diagrams in
those slides. In particular, see slides 25 to 29. (012)
From the paper you cited (by Hoffman et al.)
> This model holds that in addition to
modality-specific sources
> of information ("spokes") and their
inter-connections, representation
> of conceptual knowledge requires an integrative
"hub". The hub
> uses information from the modality-specific
spoke regions to develop
> modality-invariant, conceptual representations
that capture deeper
> patterns of conceptual similarity across all
sensory-motor and
> verbal modalities. (013)
I certainly agree with that point, and so would
Syd. (014)
In slide 28 goal2.pdf, Lamb had a "hub" marked C
(for 'concept')
in the parietal lobes. That region of the brain
is specialized for
cognitive maps or patterns that relate spatial
relations to the
sensory-motor modalities. The parietal lobes are
critical for
linking various sensory-motor regions with spatial
and auditory
regions. (015)
> The hub-and-spoke framework holds that the ATL
hub provides this
> critical aspect of conceptual representation
through the formation
> of representations that integrate information
from all sensory-motor-
> verbal domains. (016)
Syd and I would agree that the ATL hub (Anterior
Frontal Lobe) is
critical for certain kinds of information, which
could be called
a "critical aspect" of conceptual information. (017)
The question of which, if any, of the many nodes
in the cortex should
be designated as the principal node for a concept
is open for debate.
The most likely answer is that many different hubs
are specialized
for different aspects of what we might call
conceptual information. (018)
Note that "conceptual" information about verbs is
located in BA 47
of the frontal lobes, just below Broca's area.
See slides 15 to 18
and slides 23 to 27. (019)
In any case, this article is an important
contribution, and I plan
to add another slide to goal2.pdf to cite it. (020)
John (021)
PS: Sydney Lamb was the thesis adviser to George
Heidorn, who went to
IBM Research. One of the early implementations of
conceptual graphs
used a version of the software based on Heidorn's
dissertation. See (022)
http://www.jfsowa.com/pubs/cg1986.pdf (023)
George H. and Karen Jensen later went to Microsoft
Research, where they
implemented the grammar checker for MS Word. If
you saw any little
green squiggles, you can thank George, Karen, and
Sydney. (024)
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