Chapter 12: Axial Muscles Nane Date POST-LABORATORY WORKSHEET The Ocorresponds t
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Chapter 12: Axial Muscles Nane Date POST-LABORATORY WORKSHEET The Ocorresponds to the Leeming OlectveNIsted in the chapter opener e tine. Exercise 12.1: Muscles of Facial Expresslon with Its movement isted in coum A t. Match each muscle of facial expression listed In column B Column & a bucclnator b. epicranus corbicularis ocul d. orbicularis oris e. platysma Column A blink or close eyes wrikie forehead, raise eyetrows bense sidin of neck compress cheeks nerve. O 2. The muscles of focial expression are innervated by the Exercise 12.2 Extrinsic Eye Muscles For each ofthe eye movements isted povide the edinsic eye muscle that creates that action (consider orty movement of the right eye). Look up and out dateral Look lateral only Look medial only Look up and in (mediat: Look down and in (medie Look down and ot 0aeran Exercise 12.3: Muscles of Mastication 4. Match each muscle of mastication Asted in coumn B vth its movement asted in Col mn A Column & a. temporalis b medial pterygoid c. laterel pterygoid d. masseder grind food side to side answers elevate mandible (3 answers - depresses the chin -protract mandble, depress chin (3 answers) S. The muscies of mastication re Innervated by the s. If the fecial nerve ls severed. which of the following muscles ill not be paralyzed? (Crcle all hat apply) O O a. buccinator b. masseter c frontalis e. epicranius Exercise 12.4: Muscles That Move the Tongue Explain the difference in location of the itinsic muscles of the torge and extr e muscles ofthe tongue 8. The gerioglossusmusede is artrinsieetmicfcircle one) muscle of the tongue. O Exercise 12.5:Muscles of the Pharynx 9. The pharyngeal muscles that narrow the diameter of the pharynx during swallowing are called pharyngeal Chapter Twelve Axial Muscles 249Explanation / Answer
1) match the following
Platysma tense skin of neck
Buccinator compresses the cheeks
Orbicularis Oris closes the mouth
Epicranius muscle wrinkles forehead and help in raising eyebrow
Orbicularis oculi helps in blinking of eye
Answer 2) facial muscles are innervated by vii cranial nerve i.e the facial nerve
Answer 3) lateral rectus - look lateral only
Medial rectus- look medially only
Superior rectus- - look up and in
Inferior oblique - look up and out
Inferior rectus - look down and in
Inferior oblique- look down and out.
Answer 4) grind food side to side - temporalis, medial pterygoid along with lateral pterygoid
Elevate mandible- temporalis, medial pterygoid, masseter
Depress the chin- lateral pterygoid
Protract mandible, depress chin- lateral pterygoid, medial pterygoid, masseter
Answer 5) muscle of mastication are innervated by the mandibular nerve ( 3rd branch of V cranial nerve.. that is trigeminal nerve)
Answer 6) masseter because it is innervated by mandibular nerve and not facial nerve
Answer 7) intrinsic muscles are not attached to bone. They change the position of tongue.
Extrinsic muscles are attached to the bone. They change the position of tongue.
Answer 8) genioglossus is extrinsic muscle of tongue
Answer 9) pharyngeal constrictor muscles narrows the diameter of pharynx.
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