Hi LuAnn,
A posterior tongue tie is a restrictive lingual frenulum that does not 
go all the way to the tip of the tongue, but still affects tongue 
movements. They are mostly missed by the Hazelbaker scale, which was a 
wonderful early attempt to codify diagnosis of tongue tie by looking at 
multiple tongue mobility parameters, because most babies with posterior 
tongue-tie can raise their tongue to mid-mouth.

Dr. Coryllos and I wrote an article on the issue for the AAP 
breastfeeding section newsletter, it is still available online at 
http://www.aap.org/breastfeeding/8-27%20Newsletter.pdf

Catherine Watson Genna, IBCLC  NYC

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