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Thought, Sense and Movement > Larynx > Flashcards

Flashcards in Larynx Deck (24):
1

What is the action of the suprahyoid muscles?

Elevate the hyoid and larynx

2

What is the action of infrahyoid muscles?

Depress the hyoid and larynx

3

Name the four Infrahyoid extrinsic muscles of the larynx?

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

4

Which intrinsic muscle depresses the hyoid bone and elevates the larynx?

Thryohyoid

5

Name the four suprahyoid extrinsic muscles of the larynx?

Mylohyoid
Geniohyoid
Stylohyoid
Digastric

6

Inside the larynx a synovial joint occurs between which two structures?

Inferior cornu of thyroid cartilage
Cricoid cartilage

7

Which type of cartilage makes up the cartilaginous structures of the larynx? What is the exception to this?

Hyaline
Epiglottis - elastic cartilage

8

Which structure extends downwards and attaches onto the vestibular ligaments?

Quadrangular membrane

9

The space above the two vocal ligaments is known as?

Supraglottic/vestibule cavity

10

The space below the two vocal ligaments is known as?

Infraglottic cavity

11

Name the recess formed between the cricoid cartilage and the thyroid?

Piriform fossa

12

Name the space between the lingual tonsil (back of the tongue) and epiglottis?

Vallecula space

13

Name the space between the two vocal ligaments?

Rima glottis

14

Name the six intrinsic muscles of the larynx? What is their innervation?

Posterior cricoarytenoid - CN X (RLB)
Inter-arytenoids- CN X (RLB)
Lateral cricoarytenoid- CN X (RLB)
Thyroarytenoid- CN X (RLB)
Vocalis- CN X (RLB)
Cricothyroid- CN X (SLB - external)

15

What is the function of cricothyroid?

Increases the tension of the vocal cords (increased pitch)

16

What is the function of vocalis?

Fine adjustments to the vocal ligaments

17

What is the function of thyroarytenoid?

Slackening of vocal cord (decreased pitch)

18

What is the function of lateral cricoarytenoid?

Adduct the vocal ligaments

19

What is the function of inter-arytenoid?

Adduct the vocal ligaments

20

What is the function of posterior cricoarytenoid?

ABduct the vocal ligaments - open the vocal folds

21

Name the two branches of CN X - Vagus?

Recurrent laryngeal branch
Superior laryngeal branch (internal and external)

22

What does the recurrent laryngeal branch innervate?

All the intrinsic muscles of the larynx except for cricothryoid
It is sensory to the infraglotic cavity

23

What innervates cricothyroid?

External superior laryngeal branch of vagus
It is also sensory to the supraglotic/vestibule cavity

24

What passes through the aperture on the thyrohyoid membrane?

Internal superior laryngeal branch of vagus