Split-brain/Consciousness

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Sun Nov 5 13:44:38 EST 1995


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>From:	Postmaster at neubio.sld.ar (Administrador del Nodo)
>Subject: Split-brain/Consciousness
>Date:	Sat, 4 Nov 1995 19:29:22 -0300
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>Hi, again!
>          
>           I delighted reading the exchanges of Donna Tabbish,
>Brian Sandle and Pat Bermingham "the illuminator" on split
>brain (and typewriting with only one brain stem! :-) ).
>
>           Regarding "functional" and surgical split-brain,
>I remember having helped recently someone by posting my
>remembrance that an article entitled "Functional split brain"
>was published early in the seventies; I don't remember its
>author but the source was located in California, and the 
>Science Citation Index should yield it under those words.
>
>           Anyway, the split-brain is one form of parcella-
>tion of the unknown processes furnishing contents to experien-
>ce, a parcellation concomitant to a partition of the parenchy-
>matous substrate.
>
>           As such it was first studied by  Karl Bonhoeffer and
>(separately) Karl Kleist in the first World War injured soldiers.
>It is since then clear that some of the continuities of the pa-
>renchyma (parenchymatuous histocontinuity, water hydrogen-bonding
>average percolation, background fields continuity, ionic concen-
>tration-dispersion limits, or other) are required for the process
>of providing contents to experience, and that if disease par-
>titions such crucial continuity (or continuities), then several
>experiencings become isolated amid the same parenchymatous volu-
>me.
>
>           Such physicochemical partitioning has nothing to do
>with the blocking of links among mental contents, that could
>separate some assemblies of such contents able of behaving as
>if one unique experiencing were not having experience of all them.
>(For this unrelated problem, an excellent source is Henri F.
>Ellemberger's "The Discovery of the Unconscious. The history &
>evolution of dynamic psychiatry" of Basic Books, N. York, espe-
>cially chapters V -on its context- and VI -on Pierre Janet).
>
>           The logical implication is that sharing a functional
>parcel of neurocognitive parenchyma can provide contents to one
>unique experiencing. This is a most interesting but somehow
>relegated part of the subject. 
>
>          In 1978, notes here say, there were twins sisters united
>by the skull (craneopagi) separated in USA, at their (or rather her, 
>until surgery) age of four years. 
>
>            If they were not had been possessed of two separate
>dural bags, but had one continuous brain gray, we could have expec-
>ted the possible detection of shared mental contents. But true
>cephalopagi are rare and, even more, searches for this eventual
>fact in "skull Siamese" twins.
>
>            Does anyone there know more on this particular aspect? 
>
>                   Cheers,
>                              Mariela
>
>       =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
>       Prof. Mariela Szirko,
>       <postmaster at neubio.sld.ar> 
>                            
>       Centro de Investig. Neurobiologicas, Ministry
>       of Health & Welfare, Argentine Republic; and Lab. of
>       Electroneurobiological Res., Hospital "Dr. Jose Tiburcio Borda", 
>       Municipality of Buenos Aires,
>       Office:  Phone/Fax (54 1) 306 -7314
>                e-mail <postmaster at neubio.gov.ar>
>       Standard disclaimer: Las opiniones de este mensaje son personales 
>      y no comprometen las dependencias a cargo de la firmante.
>  Reply to THIS message,  ONLY to: <postmaster at neubio.sld.ar> 
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>
>

       =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
       Prof. Mariela Szirko,
       <postmaster at neubio.sld.ar> 
                            
       Centro de Investig. Neurobiologicas, Ministry
       of Health & Welfare, Argentine Republic; and Lab. of
       Electroneurobiological Res., Hospital "Dr. Jose Tiburcio Borda", 
       Municipality of Buenos Aires,
       Office:  Phone/Fax (54 1) 306 -7314
                e-mail <postmaster at neubio.gov.ar>
       Standard disclaimer: Las opiniones de este mensaje son personales 
      y no comprometen las dependencias a cargo de la firmante.
  Reply to THIS message,  ONLY to: <postmaster at neubio.sld.ar> 
  =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=




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