( ) ( ) .

( ) Functional articalation disorder ( ).

( ) Powers ( 1971 ) ( ) ( ) .

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ޡ ɡ .

( ) tongue thrust ( ) reverse swallow ( ) Carrell ( 1968 ) .

( ) Mason ( Proffit ( ( 1974 ) 80% ( ) ( ) .

auditory menory ( Winitz 1969 ) discrimination ( 1967 ) ǡ .

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