Larynx

Question 1

how many cartilages are located within the larynx?

Answer 1

9 - 3 unpaired, 6 paired

Question 2

what are the 3 unpired cartilages in the larynx?

Answer 2

epiglottis
thyroid
cricoid

Question 3

the two lamina of thyroid cartilage join anteriorly to form what?

Answer 3

laryngeal prominence (adam’s apple)

Question 4

what is the complete ring of hyaline cartilage that marks the inferior border of the larynx?

Answer 4

cricoid cartilage

Question 5

where does the larynx end?

Answer 5

C6

Question 6

the cricoid cartilage articulates with which paired cartilage?

Answer 6

arytenoid cartilages

Question 7

cricoid pressure

Answer 7

applying pressure to the cricoid to occlude to oesophagus to prevent the regurgitation of gastic contents during emergy intubation

Question 8

what marks the entrance to the larynx

?

Answer 8

epiglottis

Question 9

what happens to the epiglottis during swallowing?

Answer 9

flattens and moves posteriorly to close larynx and prevent aspiration

Question 10

what are the 3 paired cartilage of the larynx?

Answer 10

arytenoid
corniculate
cuneiform

Question 11

where are the arytenoid cartilages found?

Answer 11

on the cricoid cartilage

Question 12

anatomically the larynx can be divided into what 3 sections?

Answer 12

supraglottis
glottis
subglottis

Question 13

what is the arterial supply to the larynx?

Answer 13

superior laryngeal artery
inferior laryngeal artery

Question 14

what is the motor and sensory innervation of the larynx?

Answer 14

recurrent laryngeal nerve - infraglottis and all internal muscles (except cricothyroid)
superior laryngeal nerve - supraglottis and cricothyroid

Question 15

what is the action of the cricothyroid muscle?

Answer 15

stretches and tenses vocal ligament - important in creation of forceful speech

Question 16

what is the action of hte thyroarytenoid muscle?

Answer 16

relaxes the vocal ligament - allows for softer voice

Question 17

what is the action of the posterior cricoarytenoid muscle?

Answer 17

sole abductors of vocal folds - widens the rima glottidis

Question 18

what is the action of the lateral cricoarytenoid?

Answer 18

adducts the vocal folds - narrows the rima glottidis, modulaiting tone and volume of speech

Question 19

what are the actions of the transverse and oblique arytenoids?

Answer 19

adduct the arytenoid cartilages - closes posterior portion of rima glottidis

Question 20

Label the cartilage in the larynx

Answer 20

Question 21

Label the external ligaments of the larynx

Answer 21

Question 22

Label the infrahyoid muscles

Answer 22

Question 23

Label the laryngeal membranes

Answer 23

Question 24

Label the larynx

Answer 24

Question 25

Label this posterior view of the larynx

Answer 25

Question 26

Label this posterior view of the intrinsic muscles of the larynx

Answer 26

Question 27

Label the intrinsic muscles of the larynx

Answer 27

Question 28

Label the suprahyoid muscles

Answer 28

Question 29

Label the branches of the vagus nerve

Answer 29