Chapter 12: Axial Muscles The Oeo responds tothe Leaning ou es POST-LABORATORY W

Question

Chapter 12: Axial Muscles The Oeo responds tothe Leaning ou es POST-LABORATORY W ited n-chow-w Exercise 12 Muscles of Faclal Expression 1 Match each muscle of fecial expression sted in coumn B with its movement isted in column A. blink or close eyes close mouth wirkle forehead, raise eyebrows a buccinator b. epicrenius _ orbicularis ocus tense sikin of neck platyame 2. The muscles of facial expression are innervated by the Exercise 122 Extrinsic Eye Muscles nerve. O For each of the eye movements listed, provide the extrinsic Look lateral only Look medial only Look up and in imedial eye muscle that creates that action iconaider only movement of the right eye. e Look up and out patera Look down and in (medial) Look down and out Otera Exercise 12.3: Muscles of Mastication 4. Match each muscle of masticaeon listed in column B with ts movement isted in coun A Column A -grind food side to side Column B a temporalis b medial pterygoid 2 answers) elevate mandible (3 answers) depresses the chin leteral pterygold d. masseter -protract mandble, depress china answers S. The muscles of mastication are innervated by the nerve. O the facial nerve is severed, which of the following muscles wil not be paralyzed?!Crde a buccinator b. masseter c frontalis 6. that opply)0 0 e. epicranius Exercise 12.4: Muscles That Move the Tongue 7. Explain the difference in location of the intrinsic muscles of the tongue and extrinsic muscles of the tongue. C 8. The genioglossus muscle is an) Intrinsic/extrinsic (dircle onel muscle of the tongue O Exercise 12.5 Muscles of the Pharynx n called pharyngeal 9. The pharyngeal muscles that narrow the diameter of the pharynx during swallowing are Chapter Twelve Axial Muscles 248

Explanation / Answer

12.1

1.

blink or close the eyes - c. Orbicularis oculi

Close mouth - D.orbicularis oris

Wrinkle forehead, raise eyebrow - B. epicranius

Tension the skin of neck - e. Platysma

Compress cheeks - a. Buccinator

2.

Facial nerve (7th cranial nerve) innervates the muscles of facial expressions.

12.2

3.look lateral only - lateral rectus

Look medial only - medial rectus

Look up and in - superior rectus

Look up and out - inferior oblique

Look down and in - inferior rectus

Look down and out - superior oblique

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