Mike,
As I understand it, the lateral cricoarytenoids connect with the arytenoid cartilage on the opposite side of the vocal processes (where the vocal folds meet the arytenoids) and swivel the arytenoids together there. This leaves a triangular shaped gap that particularly affects jr. high girls (and their teachers, I might add!). This gap is closed by the interarytenoids (transverse and oblique arytenoids), hence the reason why the adduction is not complete with the lateral cricoarytenoids alone. Here is a link and a picture that I hope will help. The picture is taken from Barbara Doscher's "Functional Unity of the Singing Voice." I have placed it in the file section of the website, since I am not sure that we are supposed to send attachments. Here is the link to the website, and to the picture:
http://www.lumen.luc.edu/lumen/MedEd/GrossAnatomy/dissector/mml/lcri.htm http://groups.yahoo.com/group/vocalist-temporary/files/arytenoids.jpg
Sorry that the picture is so huge. I am not good at scanning, and can't seem to make it any smaller.
Hope I got that right!
David Grogan ETBU Music Marshall, Texas dgrogan@e... dgrogan@e...
----- Original Message ----- From: <Greypins@a...> From: <Greypins@a...> To: <vocalist-temporary@yahoogroups.com> To: <vocalist-temporary@yahoogroups.com> Sent: Saturday, January 27, 2001 7:52 PM Subject: [vocalist] adduction questions
> according to meribeth bunch (page 64 of 'dynamics of the singing voice', > 3rd ed.), > the lateral crico-arytenoid muscles cause adduction of the vocal folds. her > illustrations clearly indicate how these muscles are connected to the cricoid > cartilege. what they don't show is how the muscles are connected to the > arytenoid cartilege. (i can only picture them being connected, up from > under, to the inside of the arytenoid cartileges if they are to cause > adduction.) how does the contraction of these muscles move the arytenoid > cartileges and how does that movement cause adduction? also, how is > adduction distinct from closing of the glottis, which miller attributes to > the action of the transverse arytenoid muscles? > > mike > > > > > > > >
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