Received: by alpheratz.cpm.aca.mmu.ac.uk id TAA09433 (8.6.9/5.3[ref pg@gmsl.co.uk] for cpm.aca.mmu.ac.uk from fmb-majordomo@mmu.ac.uk); Thu, 23 Mar 2000 19:23:33 GMT Message-Id: <200003231915.OAA07075@mail5.lig.bellsouth.net> From: "Joe E. Dees" <joedees@bellsouth.net> To: memetics@mmu.ac.uk Date: Thu, 23 Mar 2000 13:25:38 -0600 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: RE: Self-Acquisition In-reply-to: <NKOIMBILJCHJICAA@my-deja.com> X-mailer: Pegasus Mail for Win32 (v3.12b) Sender: fmb-majordomo@mmu.ac.uk Precedence: bulk Reply-To: memetics@mmu.ac.uk
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Date sent: Thu, 23 Mar 2000 01:50:08 -0800
From: "Scott Chase" <hemidactylus@my-Deja.com>
Subject: RE: Self-Acquisition
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Send reply to: memetics@mmu.ac.uk
>
> --
>
> On Wed, 22 Mar 2000 15:45:40 Joe E. Dees wrote:
> >From: "Chris Lofting" <ddiamond@ozemail.com.au>
> >>
> (snip)
> >>
> >> As we see in hippocampus, there is a link of waypoint mapping to territorial
> >> mapping and this leads to the abstraction of mine/not mine to
> >> correct/incorrect. Further abstraction takes us into the neocortex and the
> >> root of syntactic processing which is sourced in that part of the brain best
> >> associated with object thinking, encapsulated thinking, SELF thinking.
> >>
> >This granting of specific semantic specifications (mine/not mine,
> >correct/incorrect), for all humans, to a particular midbrain (limbic
> >system) component which is known primarily for its roles in
> >memory and emotion is a speculation without scientific basis at
> >the present state of cognitive science. Current speculation upon
> >the location of Antonio Damasio's "sense of self" includes, but is
> >not limited to, the midbrain (primarily the reticular activating
> >system).
> >>
> >> The emotion linked to the syntax concept has been located by Demasio et al.,
> >> in the left hemisphere of the brain. Thus there is a fundamental emotion
> >> linked to the concept of "I".
> >>
> >Emotions are generated in the limbic system, which is midbrain. I
> >own two of Damasio's books (Descartes' Error and The Feeling of
> >What Happens); please refer me to pagination for this contention.
> >
> Ummm, provide me with support for your contention that the limbic system is midbrain (mesencephalon). I'll be a monkey's uncle, but I thought the components of the limbic system were considered part of the forebrain (prosencephalon). Am I mistaken?
>
You are correct that the limbic system is located in the forebrain,
beneath the cerebral cortex yet above the pons medulla. I used
the midbrain term because I was thinking of MacLean's
Hypothesis, a triune division of the human brain into the old, or
reptilian, brain (pons medulla), controlling breathing, heartbeat,
locomotion, fighting, mating, and other fixed and stereotypical
behaviors, the old mammalian brain, or limbic system, (which he
called the midbrain, but is now known as the forebrain), which
contributes emotional components such as fear, anger and love,
and the new mammalian brain, or cerebral cortex, which is the seat
of cognition. This inner-outer schema is one of three ways to divvy
up the brain, the other two being the longitudinal scheme, (front-
back) which locates conception anterior to the Sylvan fissure in the
frontal lobes and perception in the temporal and parietal lobes,
posterior to it, with the afferent and afferent (sensory and motor)
nerves meeting at the fissure, and the familiar Roger Sperry
left-right hemispherical division, mediated by the corpus callosum.
>
> I do recall the superior and inferior colliculi of the corpora quadrigemina being part of the midbrain and involved in visual and auditory functions respectively though.
>
> Scott
>
>
>
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