Larynx Flashcards

1
Q

Larynx

Location

Functions

A
  • Midline opposite C3-6
  • Larger in males
  • Functions- prevents food from entering airway
  • Phonation of voice box
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2
Q

Larynx regions

3

A
  • Vestibule
    • Near epiglottis
  • Ventricle
    • Region of vocal cords
  • Infraglottic
    • Inferior to glottis
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3
Q

What are the 3 unpaired cartilages

A

Thyroid

Circoid Epiglottic

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4
Q

Thyroid cartilage

Type

Location

A

Hyaline cartilage

Larget pharyngeal cartilage

Lies between C4-C6

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5
Q

Thyroid cartilage

Connects…

What passes through

A
  • Connects to hyoid bone via thryrohyoid membrane
  • Passing through the thyrohoid membrane
    • Superior laryngeal nerve
    • Superior laryngeal a.
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6
Q

Thyroid cartilage landmarks

A

Layngeal prominence (Adams apple)

Oblique line

Thyroid notch

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7
Q

Circoid cartilage

Type location

A

Hyaline cartilage

Most inferior laryngeal cartilage

Lies at C6

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8
Q

What attaches to circoid cartilage

A

Intrinsic and extrinsic laryngeal muscles

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9
Q

Epiglottic cartilage

Type

Loction

Innervation

A

Leaf shaped elastic cartilage at root of tongue

Covered in uscous membrane

Taste buds CN X

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10
Q

3 Paired Cartilages

A

Arytenoid

Corniculate

Cuneiform

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11
Q

Arytenoid cartilage

type

Forms

A

Hyaline cartilage

Forms framework for true vocal cords

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12
Q

Cuneiform Cartilage

type

Location

A

Elastic cartilage

Superior to corniculate cartilages

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13
Q

True vocal cord or voccal fold

A

Vocal ligament and vocalis muscle

Inferior to false vocal cord

Involved in sound production

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14
Q

False vocal cords or vestibular fold

A

Free edge or quadrangular membrane or vestibular ligament

No role in vocalization

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15
Q

Rima Vestibuli

what is it and whats between

A

Triangular opening

Between vestibular folds (false vocal cords)

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16
Q

Rima glottidis

A

Narrower triangular opening

Between vocal folds (Vocal cords)

17
Q

Primary function of Intrinsic laryngeal muscles

A

Regulate tension on vocal cords

18
Q

Extrinsic muscles of Larynx

and asction

A
  • Raise larynx
    • Suprahyoid
    • Stylopharyngeus
  • Depress larynx
    • Infrahyoid muscles
19
Q

Circothyroid****

Action

Innervation

A
  • Intrinsic muscle of pharynx
  • Increases tension on vocal ligaments
  • Only laryngeal muscle innervated by Superior laryngeal (branch of CNX)
20
Q

What innervates all laryngeal muscles

Which is the exception

A

Recurrent laryngeal nerve branch of CN X

Cicothyroid is the exception

21
Q

Posterior circoarytenoid action

A

Opens rim glottidis

Maintain an airway through the larynx

22
Q

Lateral Circoarytenoid action

A

Closes (adducts) rima glottidis

23
Q

Tranverse arytenoid

A

Closes rima glottidis

24
Q

Oblique arytenoid action

A

Closes rima glottidis

25
Vocalis action
Adjusts tension on vocal ligaments
26
Which muscles help close laryngopharyngeal opening
Aryepiglotticus Thyroepiglotticus
27
Thyroarytenoid action
Decreases tension of vocal ligaments
28
Arterial supply of Larynx\*\*\*
* 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
29