1.31 Larynx Flashcards Preview

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Flashcards in 1.31 Larynx Deck (26):
1

Name all of the extrinsic/strap muscles of the larynx…

Stylohyoid, digastric, omohyoid, thyrohyoid, sternohyoid,

2

Which muscles are suprahyoid muscles and what is there function?

Stylohyoid, digastric
Elevate hyoid and larynx
*digastric could also depress mandible

3

Which muscles are infrahyoid muscles and what is there function?

Omohyoid, sternohyoid and thyrohyoid
Depress hyoid and larynx
*thyrohyoid elevates larynx

4

What is the function of the sternothyroid muscle?

Depress thyroid cartilage - doest attach to hyoid bone

5

What are the laryngeal cartilages made up of?

All made from hyaline, except for the epiglottis which is elastic

6

What happens during puberty to the vocal ligament?

Thyroid gland and vocal ligament increase due to testorsterone

7

What enables the thyroid to rock backward and forwards?

Synovial joint

8

Which membrane is an emergency tracheostomy performed through?

Cricothyroid membrane

9

Swelling of which cavity causes the vocal folds to close off?

Supraglottic cavity - close of vocal cords

10

Where can fishbones get stuck?

Piriform fossa - can damage nerve to the intrinsic laryngeal muscles

11

What happens to the vocal cords during forced inspiration?

Vocal folds abducted, and rima glottis wide open - vestibule open

12

What happens to the vocal cords during Phonation?

Vocal fold adducted, and vestibule open

13

What happens to the vocal cords during effort closure?

vocal folds and vestibular folds adducted - everything closed

14

What adducts and abducts the vocal ligaments?

Movements of the arytenoid cartilage

15

What is the function and innervation of the Posterior cricoarytenoid?

Innervation - recurrent laryngeal X
Function - rotates and pulls arytenoids down - abducts vocal folds and open glottis (only muscle that does this)

16

What is the function and innervation of the inter-arytenoids?

Innervation - recurrent laryngeal X
Function - adductor of vocal ligament - glottis narrowed - quiet inspiration

17

What happens if paralysis of the posterior cricoarytenoid occurs?

Paralysis of glottis - flaccid closure of glottis - suffocation

18

What is the function and innervation of the lateral cricoarytenoid?

innervation - recurrent laryngeal X
function - rotates aretynoids - vocal processes brought closer together - glottis narrowed

19

What is the function and innervation of the Thyroarytenoids & vocalis?

Both recurrent laryngeal innervation
Thyroarytenoids - shortening and thickening of vocal cords - changes pitch
Vocalis - attaches to the vocal ligament - fine adjustment

20

What is the function and innervation of the cricothyroid muscle?

Innervation - external laryngeal
Function - elongation of vocal cords - increased pitch

21

Which muscles are involved in the closing of the epiglottis?

Pull epiglottis down - interarytenoids, aryepiglottic
Elevate larynx - digastric, mylohyoid, stylohyoid, genioglossu

22

Which laryngeal muscle isn’t innervated by the recurrent laryngeal nerve?

Cricothyroid

23

What type of innervation does the recurrent laryngeal nerve provide?

Motor - all intrinsic muscles except for cricothyroid
Sensory - BELOW vocal cords

24

What type of innervation does the superior laryngeal nerves (X) provide?

Internal laryngeal - sensory - ABOVE vocal cords
External laryngeal - motor - cricothyroid

25

What is the blood supply to the larynx?

Superior and inferior thyroid artery
Sup. and mid. thyroid vein - int. jugular
Inf. thyroid vein - brachiocephalic

26

Explain some laryngeal dysfunctions by nerve damage?

Causes - trauma, tumours, viral infections
Symptoms - voice, airway, swallowing
lung - can affect it too