Question

A common facial expression which indicates shock or surprise is when one's mouth drops open. The chin drops and the mouth opens wide. What type of movement is this?

Answer 1

Depression movement occurs when the chin drops and the mouth opens wide.

What is Depression movement?

This refers to the downward movement of the mandible and usually occurs at the temporomandibular joint.

This is used to express shock or surprise which was why it was chosen as the most appropriate choice.

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