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From: pamp@bcsaic.UUCP (pam pincha)
Newsgroups: net.med,net.kids,net.social,net.legal
Subject: Re: Changing Left-handedness to Right-handedness
Message-ID: <236@bcsaic.UUCP>
Date: Tue, 27-Aug-85 13:12:24 EDT
Article-I.D.: bcsaic.236
Posted: Tue Aug 27 13:12:24 1985
Date-Received: Fri, 30-Aug-85 09:35:19 EDT
References: <127@unc.unc.UUCP> <464@petrus.UUCP> <1149@teddy.UUCP> <761@brl-tgr.ARPA> <363@ccice1.UUCP> <208@pyuxii.UUCP>
Reply-To: pamp@bcsaic.UUCP (pam pincha)
Organization: Boeing Computer Services AI Center, Seattle
Lines: 49
Xref: watmath net.med:2238 net.kids:1790 net.social:921 net.legal:2198
Summary: 

In article <208@pyuxii.UUCP> tw8023@pyuxii.UUCP (T Wheeler) writes:
>Just thought I would throw in my 2 cents.  I have a 15 year old
>who bats left and eats right.  He has trouble batting righty, but
>does everything else from the right just fine, except produce
>clear legible handwriting.

There is one fact that should be noted - the consistent use
of only the left hand for all purposes is actually rarer than
people here might think.

In Sandra F. Witelson's article The brain
connection :The Corpus Callosum is larger in Left-Handers
(Science,1985,Aug.16,vol.229,no.4714,p.665-668)
, she states that in her study of the brains of 42 subjects
	"from 25 to 65 years at death ....
	 ....27 showed consistent right-hand prefernce and
	 15 showed mixed-hand preference, the later group
	showing various combinations of right- and left-hand preferences.
	Consistent left-hand prefernce is rare, and no consistent
        left-handers were availabe in this sample."
(M.Annett,1967 (Q.J.Exp.Psychol.,vol.19,p.327-343) 
	In Annets classification,

        --consistent right-handers have only
	right- and no left-hand preferences:
	-- consistent left-handers have only left- and no right-hand
	preferences;
	-- mixed henders have any other combination, regardless of
	hand for writing.
	
In large samples, the distributions of consistent right-,mixed-,
and consistent left-handers is approximately 66,30, and 4 percent
respectively.(Annett,p.343;Witelson,p.667).)

(This article by Witelson is quite a good one on the structure
of the brain halves connections and handedness.)

>We never encouraged the use of either
>hand.  His 14 year old sister is a lefty in everything, but can
>do well from the right also.  Their 8 year old brother is a
>righty.  Don't know yet how he will bat from the left.  
>
>T. C. Wheeler

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				Pamela M. Pincha-Wagener
				(bcsaic!pamp)
(usual disclaimer)
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