Larynx

Question 1

Larynx

Location

Functions

Answer 1

• Midline opposite C3-6
• Larger in males
• Functions- prevents food from entering airway
• Phonation of voice box

Question 2

Larynx regions

3

Answer 2

• Vestibule
  
  • Near epiglottis
• Ventricle
  
  • Region of vocal cords
• Infraglottic
  
  • Inferior to glottis

Question 3

What are the 3 unpaired cartilages

Answer 3

Thyroid

Circoid Epiglottic

Question 4

Thyroid cartilage

Type

Location

Answer 4

Hyaline cartilage

Larget pharyngeal cartilage

Lies between C4-C6

Question 5

Thyroid cartilage

Connects…

What passes through

Answer 5

• Connects to hyoid bone via thryrohyoid membrane
• Passing through the thyrohoid membrane
  
  • Superior laryngeal nerve
  • Superior laryngeal a.

Question 6

Thyroid cartilage landmarks

Answer 6

Layngeal prominence (Adams apple)

Oblique line

Thyroid notch

Question 7

Circoid cartilage

Type location

Answer 7

Hyaline cartilage

Most inferior laryngeal cartilage

Lies at C6

Question 8

What attaches to circoid cartilage

Answer 8

Intrinsic and extrinsic laryngeal muscles

Question 9

Epiglottic cartilage

Type

Loction

Innervation

Answer 9

Leaf shaped elastic cartilage at root of tongue

Covered in uscous membrane

Taste buds CN X

Question 10

3 Paired Cartilages

Answer 10

Arytenoid

Corniculate

Cuneiform

Question 11

Arytenoid cartilage

type

Forms

Answer 11

Hyaline cartilage

Forms framework for true vocal cords

Question 12

Cuneiform Cartilage

type

Location

Answer 12

Elastic cartilage

Superior to corniculate cartilages

Question 13

True vocal cord or voccal fold

Answer 13

Vocal ligament and vocalis muscle

Inferior to false vocal cord

Involved in sound production

Question 14

False vocal cords or vestibular fold

Answer 14

Free edge or quadrangular membrane or vestibular ligament

No role in vocalization

Question 15

Rima Vestibuli

what is it and whats between

Answer 15

Triangular opening

Between vestibular folds (false vocal cords)

Question 16

Rima glottidis

Answer 16

Narrower triangular opening

Between vocal folds (Vocal cords)

Question 17

Primary function of Intrinsic laryngeal muscles

Answer 17

Regulate tension on vocal cords

Question 18

Extrinsic muscles of Larynx

and asction

Answer 18

• Raise larynx
  
  • Suprahyoid
  • Stylopharyngeus
• Depress larynx
  
  • Infrahyoid muscles

Question 19

Circothyroid****

Action

Innervation

Answer 19

• Intrinsic muscle of pharynx
• Increases tension on vocal ligaments
• Only laryngeal muscle innervated by Superior laryngeal (branch of CNX)

Question 20

What innervates all laryngeal muscles

Which is the exception

Answer 20

Recurrent laryngeal nerve branch of CN X

Cicothyroid is the exception

Question 21

Posterior circoarytenoid action

Answer 21

Opens rim glottidis

Maintain an airway through the larynx

Question 22

Lateral Circoarytenoid action

Answer 22

Closes (adducts) rima glottidis

Question 23

Tranverse arytenoid

Answer 23

Closes rima glottidis

Question 24

Oblique arytenoid action

Answer 24

Closes rima glottidis

Question 25

Vocalis action

Answer 25

Adjusts tension on vocal ligaments

Question 26

Which muscles help close laryngopharyngeal opening

Answer 26

Aryepiglotticus

Thyroepiglotticus

Question 27

Thyroarytenoid action

Answer 27

Decreases tension of vocal ligaments

Question 28

Arterial supply of Larynx***

Answer 28

• Superior laryngeal artery
  
  • Branch of superior thyroid, ECA
  • Passes through the thyrohyoid membrane with branch of supeprior laryngeal nerve and superior laryngeal vein
• Inferior laryngeal artery
  
  • From inferior thyroid of thyrocervical trunk
  • Travels with recurrent laryngeal nerve and recurrent laryngeal vein