When the mouth is opened wide, modiolus becomes______________?

Correct answer: C. Immobile

A. Mobile
B. Supple
C. Immobile
D. None of the above

Explanation

During wide opening of the mouth, the modiolus at the angle of the mouth is fixed by the coordinated pull of surrounding facial muscles. This stabilisation helps the lips and cheeks maintain their position during movement.

Submitted by a TestUstad contributor and published by the TestUstad editorial teamLast updated 21 September 2026

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When the mouth is opened wide, modiolus becomes______________?

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