Puckering and blowing facial expressions in people with facial movement disorders.
People with facial movement disorders are instructed to perform various facial movements as part of their physical therapy rehabilitation. A difference in the movement of the orbicularis oris muscle has been demonstrated among people without facial nerve impairments when instructed to "pucker your lips" and to "blow, as if blowing out a candle." The objective of this study was to determine whether the within-subject difference between "pucker your lips" and "blow, as if blowing out a candle" found in people without facial nerve impairments is present in people with facial movement disorders.
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