CMM 501 Unit 3

Question 1

What is the action of the palatoglossus muscle?

Answer 1

Elevates tongue, constricts posterior opening of oral cavity

Question 2

What is the action of the palatopharyngeus muscle?

Answer 2

Elevates pharynx/larynx during swallowing and speaking

Question 3

What is the action of the levator veli palatini?

Answer 3

Elevates soft palate during swallowing

Question 4

What is the action of Tensor veli palatini?

Answer 4

Tenses soft palate during swallowing

Question 5

What is the action of Salpingopharyngeus?

Answer 5

Elevates pharynx/larnynx during swallowing/speaking

Question 6

What is the action of the pharyngeal constrictors?

Answer 6

Assists in moving bolus inferiorly to esophagus during swallowing

Question 7

What is the action of the cricothyroid muscle?

Answer 7

Increases tension in vocal folds to produce a higher pitch

Question 8

What is the action of the intrinsic muscles of the larynx?

Answer 8

Moves cartilages of larynx to produce speech

Question 9

What midline cavity muscles are innervated by CN X (Vagus)? (5 muscles)

Answer 9

Palatoglossus, Palatopharyngeus, Levator veli palatini, Salpingopharyngeus, Pharyngeal Constrictors

Question 10

What nerve innervates the tensor veli palatini?

Answer 10

CN V3 (Trigeminal - Mandibular)

Question 11

Which midline cavity muscle helps to open the auditory (eustachian) tubes?

Answer 11

Salpingopharyngeus

Question 12

What is the function of genioglossus?

Answer 12

Protrude, depress, and elevates sides of tongue

Question 13

What is the function of styloglossus?

Answer 13

Retract and elevate sides of tongue

Question 14

What is the function of geniohyoid?

Answer 14

Pulls hyoid anteriorly which shortens floor of mouth and widens pharynx

Question 15

What is the function of digastric?

Answer 15

Elevates hyoid during swallowing and speaking. Can depress mandible.

Question 16

What is the action of mylohyoid?

Answer 16

Elevates hyoid, tongue, floor of moth during swallowing

Question 17

What is the action of hyoglossus?

Answer 17

Depresses tongue

Question 18

Which muscles are innervated by hypoglossus (CNXII)?

Answer 18

Genioglossus, styloglossus, Hyoglossus

Question 19

What is the action and innervation of the soft palate?

Answer 19

Seals off nasal cavity when swallowing
CN IX - sensory
CN V3 and CN X - Motor

Question 20

How is the parotid gland innervated?

Answer 20

CN V3- Sensory
Lesser petrosal nerve from CN IX via auriculotemporal nerve from CN V3 - Parasympathetic Motor

Question 21

Which artery feeds the arteries of the nasal cavity and palatine?

Answer 21

Sphenopalatine artery - causes clinically significant nose bleeds

Question 22

What is the function of sternohyoid?

Answer 22

Depresses hyoid after swallowing

Question 23

What is the function of omohyoid?

Answer 23

Depresses/retracts hyoid

Question 24

What is the function of sternothyroid?

Answer 24

Depresses hyoid and larynx

Question 25

What is the function of thyrohyoid?

Answer 25

Depresses hyoid, elevates larynx

Question 26

Which muscles does ansa cervicalis provide innervation to?

Answer 26

Sternohyoid Omohyoid Sternothyroid

Question 27

Describe ansa cervicalis

Answer 27

C1-C3 Branches loop up and down the neck anterior to SCM One end attaches to hypoglossal Other end attaches to descending C2-C3

Question 28

Which 3 CN traverse the jugular foramen?

Answer 28

CN IX CN X CN XI

Question 29

Which CN traverse the superior orbital fissure?

Answer 29

CN III CN IV CN V1 CN VI

Question 30

Which CN is responsible for visceral sensory innervation of the carotid?

Answer 30

CN IX

Question 31

What makes the cavernous sinus vulnerable to infection?

Answer 31

The cavernous sinus is vulnerable because of its connection to the external face via the ophthalmic and pterygoid plexus veins.

Question 32

What is the destination and route of the lesser petrosal nerve?

Answer 32

Parotid gland - Parasympathetic CN IX - Branches in jugular foramen and passes through middle ear along tympanic membrane. Exits near foramen ovale where is joins CN V3

Question 33

What is the destination and route of the greater petrosal nerve?

Answer 33

Glands of orbit and nose - Parasympathetic CN VII - Branches at geniculate ganglion and passes through sphenoid to join CN V2

Question 34

What nerve provides sensory innervation to the dura mater?

Answer 34

CN V (all branches)

Question 35

What are the muscles of mastication and how are they innervated?

Answer 35

Temporalis Masseter Medial pterygoid Lateral pterygoid CN V3

Question 36

What does the infraorbital artery feed?

Answer 36

Upper jaw, upper teeth, maxillary sinus

Question 37

What does the facial artery feed?

Answer 37

Superficial face around cheek, mouth, nose, lower eyelid

Question 38

Which CN controls eye lens shape?

Answer 38

CN III Oculomotor

Question 39

What is the function of superior rectus?

Answer 39

Elevates and adducts eye from straight view Medially rotates

Question 40

What is the function of inferior rectus?

Answer 40

Depresses and adducts eye from straight view Laterally rotates

Question 41

What is the function of medial rectus?

Answer 41

Adducts eye from straight view

Question 42

What is the function of lateral rectus?

Answer 42

Abducts eye from straight view

Question 43

What is the function of superior oblique?

Answer 43

Abducts, depresses, and medially rotates eye "Down and out"

Question 44

What is the function of inferior oblique?

Answer 44

Adducts, elevates and laterally rotates eye "Up and out"