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Human brain wave patterns ( EEG ) and personhood

Administrador del Nodo Postmaster at neubio.sld.ar
Tue Jan 9 11:59:28 EST 1996


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>Subject: Re: Human brain wave patterns ( EEG ) and personhood
>To:=09Postmaster at neubio.sld.ar (Administrador del Nodo)
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>Hello, neuronetters!
>
>Eveline Bernard <ebernard at pi.net> wrote:
>
>> I agree with the Argentinian lady that it can be dangerous 
>> to try to connect personhood to EEG brainwave patterns.
>>
>> Nevertheless I think it is possible to find significant differences 
>> in EEG brainwave patterns between groups of individuals.
>
>It seems a good ocassion to correct a seemingly false idea I have. 
>So, was Ron Blue right?  Can we ascertain on a single EEG if it
>pertains to a man or a woman,  a younger or older human (and
>then and provided some further comparations, if it pertains to
>another species)?
>
>> Look for litterature on NEUROMETRICS (dr. Roy John, U.S.A., 
>> and dr. de Weerd, Westeinde Ziekenhuis, den Haag, The Nether- 
>> lands) and CHAOS THEORY (Research in the Leyenburg Zieken-
>> huis, Den Haag, The Netherlands).
>> The Neurometrics method is based on multivariate analyses, a 
>> statistical technique. It finds differences between e.g. man and 
>> woman, younger and older people. The Chaos method finds dif-
>> ferences between e.g. more or less demented people.
>>           Eveline Bernard =3D   Ir. E.D.A.S. Bernard RI
>>           Paalhoeveweg 22   3775 KL  KOOTWIJK - The Netherlands
>>           tel 0577 456543     or   070 3884561
>
>I took many EEG on human and non-human brains; specially, I
>participated in marsupial observations to define the EEG appari-
>tion in embryos of the South American opposum in the pouch, and
>of course in adults of sundry mammals and birds.  While I can
>usually distinguish among vigilance states, I confess to have never
>performed such sophisticated reshuffling of EEG values. It might
>be an error due to my following prejudice: the EEG data already
>convey cancellations and additions of so multiple sources that
>I presuppose that further noise (added in reduction) will induce
>false patternings.  So we don=92t trespass the conventional tools of 
>mathematical analysis usual in brain mapping, frequency weight 
>and spectral studies.  I always bear in mind the physicochemical
>sources of the EEG, rather than emphasizing its clinical practicali-
>ties.
>
>In this nisus of justifying me, let me also tell an important episode
>increasing my proneness to minimalize further analyses. Thirty years
>ago (I was not in this world!) a bad thesis attained a doctorate in
>the Faculty of Medicine of the University of Buenos Aires. Physician
>Jorge A. Fernandez Amallo took a Geloso tape recorder and recor-
>ded one EEG channel of our Alvar Reega-XVBureau EEG-machine
>at full rewind speed. Then he played it at normal play speed and so
>believed to had identified the differences between schizo, depressed,
>maniac, paraphrenic and aggressive inpatients in the band of very-high=
-
>frequencies, very-low-amplitude activity. This doctoral thesis without
>info-theory controls was scandalously accepted with maximun honours
>by the Medicine faculty, what later spawned an important discussion
>on noise, confiability and measurement theory (the approval was not
>retired and that doctorate still remains uncontested).  This discussio=
n
>spreaded locally an acute mistrust against involved processing, rather
>alike to the one against the proverbial lying with statistics.  Howeve=
r
>probably the newly-developed methods Eveline mentions can pick up real
>facts on INDIVIDUAL EEG.  Which ones? How much? How reproducibly?
>
>So let me inquiry: ASIDE FROM GROUP DIFFERENCES, is it already 
>feasible with those new methods to establish with reasonable confidenc=
e 
>the sex, age, species or other non-EEG feature of one concrete EEG?
>
>                         Cyberkisses for everybody!
>                                  Mariela
>
>

      
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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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