QUESTIONS 4-8: Identify the muscle of facial expression that performs the action
ID: 3511389 • Letter: Q
Question
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 is the primary muscle that elevates the corners of your mouth 4. When you smile, the 5. Close one eye by blinking or squinting. This movement is initiated by the a circular muscle that surrounds the eye. is the primary muscle that depresses the corners of your mouth. 6. When you frown, the 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.Explanation / Answer
4. e. zygomatic major (muscle of facial expression that draws mouth angle superiorly and laterally)
5. b. orbicularis oculi (this can close the eye during in blinking), this is a sphincter muscle that encircles the eye
6. f. depressor anguli oris - -depress corner of lips down and laterally
7. d. platysma - -can wrinkle the skin of lower face and mouth assist with lowering corner of lips -huge muscle on the superficial layer of the neck.
8. c. buccinator muscle - flattens the cheek and retracts (draw back) the angle of the mouth. Helps with cheek (buccal) movement