The orbicularis oculi ______. elevates the upper eyelid closes the eye constricts the opening of the mouth raises the corner of the mouth
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Step 1: Identify the muscle — the orbicularis oculi is a circular (sphincter) muscle that surrounds the orbit and eyelids. Show more…
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The orbicularis oris performs all of the following actions except: A. opening the lips B. pursing the lips C. rolling the lips D. thrusting the lips 2. All of the following serve to raise the upper lip except for the: A. zygomaticus major B. zygomaticus minor C. levator labii superioris alaeque nasi D. risorius 3. The buccinator muscle derives its name from its actions relevant to ballooning the cheeks (i.e., playing a horn or trumpet), and not for its relationship to the mouth. True/False 4. Most of the muscle fibers of the orbicularis oculi insert to the skin at the: A. orbital rim of the frontal bone B. frontal process of the maxilla C. lateral canthus D. nasal process of the frontal bone 5. The buccinator is a muscle of mastication; it serves a few purposes, one of which is to retain food on the occlusal surfaces of the teeth during chewing. A. Both statements are false. B. The first statement is false; the second statement is true. C. Both statements are true. D. The first statement is true; the second statement is false.
Adi S.
QUESTIONS 4-8: Identify the muscle of facial expression that performs the action that is described. Choose your answers from the following list. Answers may be used once or not at all. a. frontalis b. orbicularis oculi c. buccinator d. platysma e. zygomaticus major f. depressor anguli oris g. orbicularis oris h. mentalis 4. When you smile, the ______ is the primary muscle that elevates the corners of your mouth. 5. Close one eye by blinking or squinting. This movement is initiated by the ______, a circular muscle that surrounds the eye. 6. When you frown, the ______ is the primary muscle that depresses the corners of your mouth. 7. As you grit your teeth, palpate the skin along the anterior surface of your neck. Notice that the skin is very tense. This response is caused by the contraction of the ______ 8. Compress your cheeks by whistling or blowing. This action is produced by the ______, which is the relatively large muscle of facial expression that can be palpated in your cheek wall.
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