Laryngeal Musculature

Question 1

digastric muscle: intrinsic or extrinsic?

Answer 1

extrinsic

Question 2

suprahyoid muscles consist of

Answer 2

• digastric muscle
• mylohyoid muscle
• geniohyoid muscle
• stylohyoid muscle

Question 3

digastric muscle: paired or unpaired?

Answer 3

paired

Question 4

digastric muscle consists of 2 things…

Answer 4

1. anterior belly
2. posterior belly

Question 5

anterior belly of the digastric muscle: function

Answer 5

hyoid and larynx are pulled forward

Question 6

anterior belly of the digastric muscle: innervation

Answer 6

vagus nerve CN10

Question 7

posterior belly of the digastric muscle: function

Answer 7

hyoid and larynx elevate and retract

Question 8

posterior belly of digastric muscle: innervation

Answer 8

facial nerve CN7

Question 9

mylohyoid muscle: intrinsic or extrinsic?

Answer 9

extrinsic

Question 10

mylohyoid muscle: paired or unpaired?

Answer 10

unpaired

Question 11

mylohyoid muscle: function

Answer 11

hyoid and larynx elevate and pull forward

Question 12

mylohyoid muscle: innervation

Answer 12

trigeminal nerve CN5

Question 13

geniohyoid muscle: intrinsic or extrinsic?

Answer 13

extrinsic

Question 14

geniohyoid muscle: paired or unpaired?

Answer 14

paired

Question 15

geniohyoid muscle: function

Answer 15

hyoid elevates and pulls forward when contracted

Question 16

geniohyoid muscle: innervation

Answer 16

hypoglossal nerve CN12

Question 17

stylohyoid muscle: intrinsic or extrinsic?

Answer 17

extrinsic

Question 18

stylohyoid muscle: paired or unpaired?

Answer 18

paired

Question 19

stylohyoid muscle: function

Answer 19

hyoid and larynx elevate and pull back

Question 20

stylohyoid muscle: innervation

Answer 20

facial nerve CN7

Question 21

infrahyoid muscles consists of

Answer 21

• thyrohyoid muscle
• sternothyroid muscle
• omohyoid muscle

Question 22

thyrohyoid muscle: intrinsic or extrinsic?

Answer 22

extrinsic

Question 23

thyrohyoid muscle: paired or unpaired?

Answer 23

paired

Question 24

thyrohyoid muscle: functions, there are 2

Answer 24

if hyoid bone is fixed…
1. larynx elevates
2. hyoid depress

Question 25

thyrohyoid muscle: innervation

Answer 25

hypoglossal nerve CN12

Question 26

sternothyroid muscle: intrinsic or extrinsic?

Answer 26

extrinsic

Question 27

sternothyroid muscle: function

Answer 27

if hyoid bone is fixed... 1. larynx elevates 2. hyoid depress

Question 28

sternothyroid muscle: innervation

Answer 28

glossopharyngeal nerve CN9

Question 29

omohyoid muscle: intrinsic or extrinsic?

Answer 29

extrinsic

Question 30

omohyoid muscle: paired or unpaired?

Answer 30

paired

Question 31

omohyoid muscle consists of...

Answer 31

1. inferior belly 2. superior belly

Question 32

inferior belly of the omohyoid muscle: function

Answer 32

hyoid and larynx pull down when contracted

Question 33

inferior belly of the omohyoid muscle: innervation

Answer 33

hypoglossal nerve CN12

Question 34

superior belly of the omohyoid muscle: function

Answer 34

hyoid and larynx pulled down

Question 35

superior belly of the omohyoid muscle: innervation

Answer 35

hypoglossal nerve CN12

Question 36

thyroarytenoid muscle: intrinsic or extrinsic?

Answer 36

intrinsic

Question 37

thyroarytenoid muscle: paired or unpaired?

Answer 37

paired

Question 38

thyroarytenoid muscle: function

Answer 38

- draws arytenoids and thyroids closer when contracted - shortens vfs, increase vf mass, decrease vf tension

Question 39

thyroarytenoid muscle: innervation

Answer 39

recurrent branch of the vagus nerve CN10

Question 40

cricothyroid muscle: intrinsic or extrinsic?

Answer 40

intrinsic

Question 41

cricothyroid muscle: paired or unpaired?

Answer 41

paired

Question 42

cricothyroid muscle consists of...

Answer 42

- pars recta (vertical part) - pars oblique (oblique part)

Question 43

pars recta of the cricothyroid muscle: function

Answer 43

- rocking thyroid cartilage forward - distance thyroid and arytenoid - responsible for raising pitch

Question 44

pars recta of the cricothyroid muscle: innervation

Answer 44

external branch of superior branch of vagus nerve CN10

Question 45

pars oblique of the cricothyroid muscle: function

Answer 45

- gliding motion - distances thyroids and arytenoids - responsible for raising pitch

Question 46

pars oblique of the cricothyroid muscle: innervation

Answer 46

external branch of superior branch of vagus nerve CN10

Question 47

lateral cricoarytenoid muscle: intrinsic or extrinsic?

Answer 47

intrinsic

Question 48

lateral cricoarytenoid muscle: function

Answer 48

- rocking arytenoids down and in - primary adductor of vfs

Question 49

lateral cricoarytenoid muscle: innervation

Answer 49

recurrent branch of vagus nerve CN10

Question 50

posterior cricoarytenoid muscle: intrinsic or extrinsic?

Answer 50

intrinsic

Question 51

posterior cricoarytenoid muscle: function

Answer 51

- rock arytenoids out and back - primary abductor of vfs

Question 52

posterior cricoarytenoid muscle: innervation

Answer 52

recurrent branch of vagus nerve CN10

Question 53

interarytenoid muscle: intrinsice or extrinsic?

Answer 53

intrinsic

Question 54

interarytenoid muscle: paired or unpaired?

Answer 54

paired

Question 55

intearytenoid muscle consists of...

Answer 55

1. transverse arytenoid muscle 2. oblique interarytenoid muscle

Question 56

transverse arytenoid muscle: paired or unpaired?

Answer 56

paired

Question 57

transverse arytenoid muscle: function

Answer 57

- draw arytenoid muscle closer - responsible for medial compression when they are closed

Question 58

transverse arytenoid muscle: innervation

Answer 58

recurrent branch of vagus nerve CN10

Question 59

oblique interarytenoid muscle: paired or unpaired?

Answer 59

paired

Question 60

oblique interarytenoid muscle: function

Answer 60

- draws 2 arytenoids closer - reinforces medial compression

Question 61

oblique interarytenoid muscle: innervation

Answer 61

recurrent branch of vagus nerve CN10