Re: Fwd: AUDITORY Digest - 21 Sep 2004 to 25 Sep 2004 (#2004-199)


Subject: Re: Fwd: AUDITORY Digest - 21 Sep 2004 to 25 Sep 2004 (#2004-199)
From: John Kamevaar (john.kamevaar@sympatico.ca)
Date: Mon Sep 27 2004 - 16:30:16 EDT


From an old Dutch saying, translated through a corpus collossum: "Blessed are the
cross-eyed for they will see two Gods".

Kevin Austin wrote:

> FYI
>
> Best
>
> Kevin
>
> >Date: Sun, 26 Sep 2004 00:00:11 -0400
> >From: Automatic digest processor <LISTSERV@LISTS.MCGILL.CA>
> >
> >There are 4 messages totalling 226 lines in this issue.
> >
> >Topics of the day:
> >
> > 1. 'Speak in my right ear and sing in my left' (3)
> > 2. 'Speak in my right ear and sing in my left' -- Sininger & Cone-Wesson,
> > Science 2004
> >
> >----------------------------------------------------------------------
> >
> >Date: Sat, 25 Sep 2004 08:30:14 -0700
> >From: hilarleo <hilarleo@UCLINK.BERKELEY.EDU>
> >Subject: 'Speak in my right ear and sing in my left'
> >
> >"Asymmetric Cochlear Processing Mimics Hemispheric Specialization"
> >Described in Science, Vol 305, Issue 5690, 1581 , 10 September 2004
> >by Y. S. Sininger and B. Cone-Wesson:
> >
> >http://www.sciencemag.org/cgi/content/full/305/5690/1581?
> >maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&author1=Sininger&author2=Cone-
> >Wesson&searchid=1096115078660_1382&stored_search=&FIRSTINDEX=0&fdate=9/
> >1/2004&tdate=9/30/2004
> >
> >This finding is similar to those of enhanced processing of tones in
> >right auditory cortical areas and of rapidly changing stimuli on the
> >left, (given strong crossed connections from ear to brain)...
> >Behaviorally, reaction time is faster and stimulus identification is
> >more accurate when a subject's right ear is presented with speech-type
> >stimuli or when the left ear is presented with tonal information ...
> > >These findings indicate that processing at the level of the ear
> >may facilitate lateralization of auditory function in the brain...
> >$$$$$$$########%%%%%%&&&&&
> >######%%%%%%&&&&&$$$$$$$##
> >%%&&&&&$$$$$$$########%%%%
> >"We always assumed that our left and right ears worked exactly the same
> >way...
> >"We were intrigued to discover that clicks triggered more amplification
> >in the baby's right ear..."
> >
> >Authorial interviews from South African Independent Media Online
> >described as
> > 'Speak in my right ear and sing in my left'; Full text follows.
> >
> >http://www.iol.co.za/index.php?
> >set_id=1&click_id=31&art_id=qw1094984284521B226
> >
> ><Washington - The right and left human ears process sound differently,
> >according to scientists who studied the hearing of babies and found the
> >right ear better at picking up speech-like sounds and the left more
> >attuned to music.
> >
> >It has long been known that the right and left halves of the brain
> >process sound differently, but those differences were thought to stem
> >from cellular properties unique to each brain hemisphere.
> >
> >The new research suggests that the differences start at the ear.
> >
> >"We always assumed that our left and right ears worked exactly the same
> >way," said lead researcher Yvonne Sininger of the University of
> >California at Los Angeles. "As a result, we tended to think it didn't
> >matter which ear was impaired in a person. Now we see that it may have
> >profound implications for the individual's speech and language
> >development."
> >
> >The discovery, described in the current issue of Science Magazine, will
> >help doctors enhance speech and language development in
> >hearing-impaired newborns and the rehabilitation of persons with
> >hearing loss.
> >
> >Sininger and her colleagues studied hearing in more than 3 000
> >newborns, specifically tiny amplifiers located in the outer hair cells
> >of the inner ear.
> >
> >These cells contract and expand to amplify sound vibrations, convert
> >the vibrations to neural cells and send them to the brain.
> >
> >The scientists inserted tiny probes into the babies' ears that emitted
> >two different types of sounds and measured the amplified vibrations.
> >They found that speech-like clicks triggered greater amplification in
> >the right ear, while music-like sustained tones were more greatly
> >amplified by the left ear.
> >
> >"We were intrigued to discover that the clicks triggered more
> >amplification in the baby's right ear, while the tones induced more
> >amplification in the baby's left ear," Sininger said. "This parallels
> >how the brain processes speech and music, except the sides are reversed
> >due to the brain's cross connections."
> >
> >"Our findings demonstrate that auditory processing starts in the ear
> >before it is ever seen in the brain," said co-author Barbara
> >Cone-Wesson of the University of Arizona. "Even at birth, the ear is
> >structured to distinguish between different types of sound and to send
> >it to the right place in the brain." - Sapa-AFP >
> >
> >$$$$$$$########%%%%%%&&&&&
> >######%%%%%%&&&&&$$$$$$$##
> >%%&&&&&$$$$$$$########%%%%
> >
> >LeOSullivan.
> >
> >
> >LeOSullivan
> >1 510 549 0146
> >UCBerkeley
> >



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